{"title":"Geodes","description":"\u003cp\u003eHollow formations lined with crystal growth, formed slowly inside a cavity over time. Cut and opened to reveal the structure that grew sealed away inside.\u003c\/p\u003e","products":[{"product_id":"tabasco-geode-i-natural-mexico","title":"Tabasco geode (I) — natural, Mexico","description":"\u003cp dir=\"ltr\"\u003eA hollow silica shell with a chalcedony rind on the outside and a lining of small quartz crystals in the cavity.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eThey're sold as Tabasco geodes, which is a misnomer. The state of Tabasco is about 800 kilometres away on the Gulf coast. These come from Rancho Agua Blanca in Tabasco Municipality, in Zacatecas, a different place that happens to share the name. Most labels also misspell the ranch as Aqua Blanca. This listing has it right, which is the whole reason the origin line is there.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eUndyed and uncoated. The colour is what the silica came out of the ground with.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eMineral:\u003c\/strong\u003e \u003cmeta charset=\"utf-8\"\u003eQuartz (silicon dioxide, SiO₂), a chalcedony rind with druzy quartz inside\u003cbr\u003e\u003cstrong\u003eCrystal system:\u003c\/strong\u003e \u003cmeta charset=\"utf-8\"\u003eTrigonal\u003cbr\u003e\u003cstrong\u003eOrigin:\u003c\/strong\u003e \u003cmeta charset=\"utf-8\"\u003eRancho Agua Blanca, Tabasco Municipality, Zacatecas, Mexico\u003cbr\u003e\u003cstrong\u003eHardness:\u003c\/strong\u003e \u003cmeta charset=\"utf-8\"\u003e7 on the Mohs scale; hard, though the rind is thin and will crack if dropped\u003cbr\u003e\u003cstrong\u003eTreatment:\u003c\/strong\u003e None\u003cbr\u003e\u003cstrong\u003eDimensions:\u003c\/strong\u003e 1.81 x 1.02 x 2.77 cm\u003cbr\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 16.84 g\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eYou will receive the exact piece photographed.\u003c\/p\u003e","brand":"The Crystal Showroom","offers":[{"title":"Default Title","offer_id":58356529889624,"sku":null,"price":43.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0778\/4880\/5720\/files\/tgm-i-1.jpg?v=1788260987"},{"product_id":"tabasco-geode-b-natural-mexico","title":"Tabasco geode (B) — natural, Mexico","description":"\u003cp dir=\"ltr\"\u003eThis started as a bubble of gas.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eLava cooling near the surface traps pockets of gas, and those pockets set into the rock as empty rounded voids. Much later, water carrying dissolved silica works its way through the rock and finds the void. Silica comes out of solution onto the cavity wall and starts building inwards.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eThat is why a geode reads backwards. The outer rind is the oldest part, the first material to be laid down, and the crystals pointing into the middle are the youngest. The hollow at the centre is simply where the water ran out before the job was finished.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eA solid one would be a nodule. The gap is the whole point.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eMineral:\u003c\/strong\u003e \u003cmeta charset=\"utf-8\"\u003eQuartz (silicon dioxide, SiO₂), a chalcedony rind with druzy quartz inside\u003cbr\u003e\u003cstrong\u003eCrystal system:\u003c\/strong\u003e \u003cmeta charset=\"utf-8\"\u003eTrigonal\u003cbr\u003e\u003cstrong\u003eOrigin:\u003c\/strong\u003e \u003cmeta charset=\"utf-8\"\u003eRancho Agua Blanca, Tabasco Municipality, Zacatecas, Mexico\u003cbr\u003e\u003cstrong\u003eHardness:\u003c\/strong\u003e \u003cmeta charset=\"utf-8\"\u003e7 on the Mohs scale; hard, though the rind is thin and will crack if dropped\u003cbr\u003e\u003cstrong\u003eTreatment:\u003c\/strong\u003e None\u003cbr\u003e\u003cstrong\u003eDimensions:\u003c\/strong\u003e 2.3 x 0.82 x 2.7 cm\u003cbr\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 8.86 g\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eYou will receive the exact piece photographed.\u003c\/p\u003e","brand":"The Crystal Showroom","offers":[{"title":"Default Title","offer_id":58428101132632,"sku":null,"price":31.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0778\/4880\/5720\/files\/tgm-b-1.jpg?v=1788954120"},{"product_id":"tabasco-geode-f-natural-mexico","title":"Tabasco geode (F) — natural, Mexico","description":"\u003cp dir=\"ltr\"\u003eThese geodes are the reason aura coating exists.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eThe story told in the trade is that they were first mined in the 1970s by the owner of Rancho Agua Blanca and brought north into the United States, where a dealer in El Paso began electroplating them with metal vapour to give them an iridescent film. They sold. Every jewellery house wanted them, the deposit was worked hard, and the technique spread to everything else on the shelf. The rainbow coatings you now see on quartz points started here, on geodes smaller than a grape.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eThat history is why the treatment line on this listing matters more than usual. Coated and dyed geodes are still everywhere, and a metal film is very difficult to spot once it is on.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eThis one has nothing on it. What you are looking at is the colour the silica came out of the ground with.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eMineral:\u003c\/strong\u003e \u003cmeta charset=\"utf-8\"\u003eQuartz (silicon dioxide, SiO₂), a chalcedony rind with druzy quartz inside\u003cbr\u003e\u003cstrong\u003eCrystal system:\u003c\/strong\u003e \u003cmeta charset=\"utf-8\"\u003eTrigonal\u003cbr\u003e\u003cstrong\u003eOrigin:\u003c\/strong\u003e \u003cmeta charset=\"utf-8\"\u003eRancho Agua Blanca, Tabasco Municipality, Zacatecas, Mexico\u003cbr\u003e\u003cstrong\u003eHardness:\u003c\/strong\u003e \u003cmeta charset=\"utf-8\"\u003e7 on the Mohs scale; hard, though the rind is thin and will crack if dropped\u003cbr\u003e\u003cstrong\u003eTreatment:\u003c\/strong\u003e None\u003cbr\u003e\u003cstrong\u003eDimensions:\u003c\/strong\u003e 2.08 x 0.74 x 3.08 cm\u003cbr\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 13.09 g\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eYou will receive the exact piece photographed.\u003c\/p\u003e","brand":"The Crystal Showroom","offers":[{"title":"Default Title","offer_id":58428419080536,"sku":null,"price":42.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0778\/4880\/5720\/files\/tgm-f-1.jpg?v=1788957739"},{"product_id":"tabasco-geode-j-natural-mexico","title":"Tabasco geode (J) — natural, Mexico","description":"\u003cp dir=\"ltr\"\u003eAmong the smallest geodes mined anywhere in the world.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eMany from this ground come out under a centimetre across. They sit in hard volcanic rock and there is no machine that helps; they are chiselled out individually by hand, from pits dug for that single purpose, and the rock does not give them up easily.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eWhich is the part worth sitting with. The same geological process that makes the enormous amethyst cathedrals from Brazil, gas cavity, mineral-bearing water, crystals growing inward, also makes this. Identical mechanism, different scale. Nothing about being small makes it a lesser example. It just took a smaller bubble.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eMineral:\u003c\/strong\u003e \u003cmeta charset=\"utf-8\"\u003eQuartz (silicon dioxide, SiO₂), a chalcedony rind with druzy quartz inside\u003cbr\u003e\u003cstrong\u003eCrystal system:\u003c\/strong\u003e \u003cmeta charset=\"utf-8\"\u003eTrigonal\u003cbr\u003e\u003cstrong\u003eOrigin:\u003c\/strong\u003e \u003cmeta charset=\"utf-8\"\u003eRancho Agua Blanca, Tabasco Municipality, Zacatecas, Mexico\u003cbr\u003e\u003cstrong\u003eHardness:\u003c\/strong\u003e \u003cmeta charset=\"utf-8\"\u003e7 on the Mohs scale; hard, though the rind is thin and will crack if dropped\u003cbr\u003e\u003cstrong\u003eTreatment:\u003c\/strong\u003e None\u003cbr\u003e\u003cstrong\u003eDimensions:\u003c\/strong\u003e 1.99 x 0.79 x 2.08 cm\u003cbr\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 6.68 g\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eYou will receive the exact piece photographed.\u003c\/p\u003e","brand":"The Crystal Showroom","offers":[{"title":"Default Title","offer_id":58428785557848,"sku":null,"price":20.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0778\/4880\/5720\/files\/tgm-j-1.jpg?v=1788960371"},{"product_id":"amethyst-geode-butterfly-a-cut-and-mounted-brazil","title":"Amethyst geode butterfly (A) — cut and mounted, Brazil","description":"\u003cp dir=\"ltr\"\u003eTwo halves of one geode, cut and mounted facing each other as a butterfly.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eThe pair was a single hollow cavity until it was opened. Everything across the two faces grew as one continuous lining, which is why the banding on the rind runs from one side to the other and the crystal field carries on across the gap. Cut once, and there is no second pair.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eThe cavity itself formed as a gas bubble in cooling lava. Silica-rich water later worked its way in and crystallised inwards, quartz first, then amethyst as iron entered the system. The purple is iron held in the quartz structure and altered by natural radiation in the ground over a very long period.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eCut geodes are reinforced before they leave the mine. The outer shell on a piece this size can be close to eggshell-thin, so the back, base and sides are cemented and the exterior painted dark to match the basalt it came out of. That is done to every cathedral and butterfly on the market and it is almost never mentioned. Nothing has been done to the crystal itself.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eKeep it out of direct sunlight. Sustained UV breaks down the iron centres that produce the colour, and amethyst that fades does not come back.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eMineral:\u003c\/strong\u003e \u003cmeta charset=\"utf-8\"\u003eAmethyst, the purple variety of quartz (SiO₂)\u003cbr\u003e\u003cstrong\u003eCrystal system: \u003c\/strong\u003eTrigonal\u003cbr\u003e\u003cstrong\u003eOrigin: \u003c\/strong\u003eBrazil \u003cbr\u003e\u003cstrong\u003eHardness: \u003c\/strong\u003e7 on the Mohs scale; hard, though individual crystal tips chip easily\u003cbr\u003e\u003cstrong\u003eTreatment: \u003c\/strong\u003eNone to the amethyst. Backing, base and exterior are cemented and painted, standard practice for cut geodes\u003cbr\u003e\u003cstrong\u003eDimensions:\u003c\/strong\u003e 36 x 17 x 35.5 cm\u003cbr\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 9.1 kg\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eYou will receive the exact piece photographed.\u003c\/p\u003e","brand":"The Crystal Showroom","offers":[{"title":"Default Title","offer_id":58431167005016,"sku":null,"price":400.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0778\/4880\/5720\/files\/abwb-a-1.jpg?v=1788977901"},{"product_id":"agate-geode-d-natural-brazil","title":"Agate geode (D) — natural, Brazil","description":"\u003cp dir=\"ltr\"\u003eWhite through the whole polished face, with the raw rind left on.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eWhite is information rather than an absence of it. Agate gets its colour from whatever the water was carrying alongside the silica, mostly iron for the reds and browns, manganese for the darker tones. A white geode means the water arrived carrying almost nothing else. Just silica, over and over, for as long as it took to fill the cavity.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eThat makes the banding easier to read than on a coloured piece, because there is nothing competing with it. You are looking at structure on its own. The rhythm of deposition, where it paused, where it sped up, and where the last of the silica gave up and finished as crystal instead of a smooth layer.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eMineral:\u003c\/strong\u003e Agate, banded chalcedony (silicon dioxide, SiO₂)\u003cbr\u003e\u003cstrong\u003eCrystal system: \u003c\/strong\u003eTrigonal\u003cbr\u003e\u003cstrong\u003eOrigin: \u003c\/strong\u003eRio Grande do Sul, Brazil\u003cbr\u003e\u003cstrong\u003eHardness: \u003c\/strong\u003e6\u003cmeta charset=\"utf-8\"\u003e.5 to 7 on the Mohs scale; durable, though the polished face will dull if knocked about\u003cbr\u003e\u003cstrong\u003eTreatment: \u003c\/strong\u003eNone\u003cbr\u003e\u003cstrong\u003eDimensions:\u003c\/strong\u003e 18.5 x 9.35 x 21 cm\u003cbr\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.69 kg                                                                                                                                        \u003cstrong\u003eNote:\u003c\/strong\u003e \u003cmeta charset=\"utf-8\"\u003eCut face polished, exterior left natural\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eYou will receive the exact piece photographed.\u003c\/p\u003e","brand":"The Crystal Showroom","offers":[{"title":"Default Title","offer_id":58512114352472,"sku":null,"price":220.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0778\/4880\/5720\/files\/agb-d-1.jpg?v=1789813180"},{"product_id":"agate-geode-c-natural-brazil","title":"Agate geode (C) — natural, Brazil","description":"\u003cp dir=\"ltr\"\u003eBrown and beige banding across a polished face, with the raw outer rind left intact.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eThese are iron colours. Agate takes its warm tones from iron oxides carried in by the water that filled the cavity, and the shade depends on how much arrived and what state the iron was in when it did. More oxidised gives redder browns, less gives the yellows and beiges. Each band is a separate delivery with its own chemistry, which is why the colour steps rather than blends.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eIt is also the honest palette. Grey, white, red and ochre are what untreated Brazilian agate actually looks like, and they are the tones collectors of natural material look for precisely because they cannot be faked convincingly. Dye produces an evenness that the real thing never quite has.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eMineral:\u003c\/strong\u003e Agate, banded chalcedony (silicon dioxide, SiO₂)\u003cbr\u003e\u003cstrong\u003eCrystal system: \u003c\/strong\u003eTrigonal\u003cbr\u003e\u003cstrong\u003eOrigin: \u003c\/strong\u003eRio Grande do Sul, Brazil\u003cbr\u003e\u003cstrong\u003eHardness: \u003c\/strong\u003e6\u003cmeta charset=\"utf-8\"\u003e.5 to 7 on the Mohs scale; durable, though the polished face will dull if knocked about\u003cbr\u003e\u003cstrong\u003eTreatment: \u003c\/strong\u003eNone\u003cbr\u003e\u003cstrong\u003eDimensions:\u003c\/strong\u003e 10.35 x 7.2 x 12.8 cm\u003cbr\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 625 g                                                                                                                                          \u003cstrong\u003eNote:\u003c\/strong\u003e \u003cmeta charset=\"utf-8\"\u003eCut face polished, exterior left natural\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eYou will receive the exact piece photographed.\u003c\/p\u003e","brand":"The Crystal Showroom","offers":[{"title":"Default Title","offer_id":58512488563032,"sku":null,"price":45.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0778\/4880\/5720\/files\/agb-c-1.jpg?v=1789814910"},{"product_id":"agate-geode-b-natural-brazil","title":"Agate geode (B) — natural, Brazil","description":"\u003cp dir=\"ltr\"\u003eA geode from the ground that made Brazil the agate capital of the world, cut and polished on one face with the rind left raw.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eThe deposits in Rio Grande do Sul were found around 1800 by German immigrants from Idar-Oberstein, a town that had been cutting agate for centuries and had just about exhausted its own supply. They recognised what they were standing on, and the stone started going back to Germany to be cut. The trade never really left. Today the Salto do Jacuí district supports around 300 companies and several thousand people, most of them small artisanal operations rather than industrial mines.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eThe geode itself is older by a distance. It began as a gas bubble in a lava flow, and silica-bearing water worked in later and lined the cavity in layers until it ran out or the space filled.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eBlue-grey and white, which is the stone's own colour rather than anything added to it.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eMineral:\u003c\/strong\u003e Agate, banded chalcedony (silicon dioxide, SiO₂)\u003cbr\u003e\u003cstrong\u003eCrystal system: \u003c\/strong\u003eTrigonal\u003cbr\u003e\u003cstrong\u003eOrigin: \u003c\/strong\u003eRio Grande do Sul, Brazil\u003cbr\u003e\u003cstrong\u003eHardness: \u003c\/strong\u003e6\u003cmeta charset=\"utf-8\"\u003e.5 to 7 on the Mohs scale; durable, though the polished face will dull if knocked about\u003cbr\u003e\u003cstrong\u003eTreatment: \u003c\/strong\u003eNone\u003cbr\u003e\u003cstrong\u003eDimensions:\u003c\/strong\u003e 10.34 x 7.4 x 13 cm\u003cbr\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 610 g                                                                                                                                          \u003cstrong\u003eNote:\u003c\/strong\u003e \u003cmeta charset=\"utf-8\"\u003eCut face polished, exterior left natural\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eYou will receive the exact piece photographed.\u003c\/p\u003e","brand":"The Crystal Showroom","offers":[{"title":"Default Title","offer_id":58512780132696,"sku":null,"price":45.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0778\/4880\/5720\/files\/agb-b-1.jpg?v=1789815430"},{"product_id":"agate-geode-a-natural-brazil","title":"Agate geode (A) — natural, Brazil","description":"\u003cp dir=\"ltr\"\u003eA geode cut open and polished across the face, the outside left exactly as it came out of the ground.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eThe blue-grey and white here is the natural colour of Brazilian agate. Worth saying plainly, because Brazil is also the centre of the agate dyeing industry, and this particular blue-grey is the reason why. The stone is unusually porous, which lets dye move through it evenly, and the pale base takes colour without fighting it. Nearly every bright blue, pink or green agate slice on the market started as material that looked something like this.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eNothing has been added to this one. What you are looking at is what the silica was carrying when it arrived.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eThe contrast between the two surfaces is the point of cutting it this way. Polished face, raw rind, and the boundary between them showing how thin the shell actually is.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eMineral:\u003c\/strong\u003e Agate, banded chalcedony (silicon dioxide, SiO₂)\u003cbr\u003e\u003cstrong\u003eCrystal system: \u003c\/strong\u003eTrigonal\u003cbr\u003e\u003cstrong\u003eOrigin: \u003c\/strong\u003eRio Grande do Sul, Brazil\u003cbr\u003e\u003cstrong\u003eHardness: \u003c\/strong\u003e6\u003cmeta charset=\"utf-8\"\u003e.5 to 7 on the Mohs scale; durable, though the polished face will dull if knocked about\u003cbr\u003e\u003cstrong\u003eTreatment: \u003c\/strong\u003eNone\u003cbr\u003e\u003cstrong\u003eDimensions:\u003c\/strong\u003e 13.33 x 8.6 x 12.65 cm\u003cbr\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 1.16 kg                                                                                                                                          \u003cstrong\u003eNote:\u003c\/strong\u003e \u003cmeta charset=\"utf-8\"\u003eCut face polished, exterior left natural\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eYou will receive the exact piece photographed.\u003c\/p\u003e","brand":"The Crystal Showroom","offers":[{"title":"Default Title","offer_id":58512890364248,"sku":null,"price":85.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0778\/4880\/5720\/files\/agb-a-1.jpg?v=1789815852"},{"product_id":"amethyst-cathedral-d-natural-brazil","title":"Amethyst cathedral (D) — natural, Brazil","description":"\u003cp dir=\"ltr\"\u003eAmethyst druzy through the centre, with a purple band crossing the quartz.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eThat band is a record of timing. Purple needs iron present while the crystal grows, so a line of it means the iron arrived, stopped, and came back later for the druzy at the centre. The clear quartz either side of the band is the interval when there was none.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eThe back and base are cemented and the outside painted dark, standard for cut geodes. The crystal itself is untouched.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eMineral:\u003c\/strong\u003e \u003cmeta charset=\"utf-8\"\u003eAmethyst, the purple variety of quartz (SiO₂)\u003cbr\u003e\u003cstrong\u003eCrystal system:\u003c\/strong\u003e \u003cmeta charset=\"utf-8\"\u003eTrigonal\u003cbr\u003e\u003cstrong\u003eOrigin:\u003c\/strong\u003e \u003cmeta charset=\"utf-8\"\u003eBrazil\u003cbr\u003e\u003cstrong\u003eHardness:\u003c\/strong\u003e \u003cmeta charset=\"utf-8\"\u003e7 on the Mohs scale; hard, though individual crystal tips chip easily\u003cbr\u003e\u003cstrong\u003eTreatment:\u003c\/strong\u003e \u003cmeta charset=\"utf-8\"\u003eNone to the amethyst. Backing, base and exterior are cemented and painted, standard practice for cut geodes\u003cbr\u003e\u003cstrong\u003eDimensions:\u003c\/strong\u003e 13 x 10 x 17 cm\u003cbr\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 6.85 kg                                                                                                                                        \u003cstrong\u003eNote:\u003c\/strong\u003e \u003cmeta charset=\"utf-8\"\u003eKeep it out of direct sunlight. Sustained UV breaks down the iron centres that produce the purple, and amethyst that fades does not come back\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eYou will receive the exact piece photographed.\u003c\/p\u003e","brand":"The Crystal Showroom","offers":[{"title":"Default Title","offer_id":58644956545368,"sku":null,"price":230.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0778\/4880\/5720\/files\/acb-d-1_bdae78f9-e618-4dc9-9c79-866a5c534f9e.jpg?v=1791135061"},{"product_id":"amethyst-cathedral-c-natural-brazil","title":"Amethyst cathedral (C) — natural, Brazil","description":"\u003cp dir=\"ltr\"\u003eA purple line running through the quartz, with amethyst druzy through the centre.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003ePurple in quartz needs iron present while the crystal is growing. A distinct line of it means the iron came and went: present for that interval, absent either side of it, then back again by the time the central druzy formed. The clear quartz between is the gap.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eThe back and base are cemented and the outside painted dark, standard for cut geodes. The crystal itself is untouched.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eMineral:\u003c\/strong\u003e \u003cmeta charset=\"utf-8\"\u003eAmethyst, the purple variety of quartz (SiO₂)\u003cbr\u003e\u003cstrong\u003eCrystal system:\u003c\/strong\u003e \u003cmeta charset=\"utf-8\"\u003eTrigonal\u003cbr\u003e\u003cstrong\u003eOrigin:\u003c\/strong\u003e \u003cmeta charset=\"utf-8\"\u003eBrazil\u003cbr\u003e\u003cstrong\u003eHardness:\u003c\/strong\u003e \u003cmeta charset=\"utf-8\"\u003e7 on the Mohs scale; hard, though individual crystal tips chip easily\u003cbr\u003e\u003cstrong\u003eTreatment:\u003c\/strong\u003e \u003cmeta charset=\"utf-8\"\u003eNone to the amethyst. Backing, base and exterior are cemented and painted, standard practice for cut geodes\u003cbr\u003e\u003cstrong\u003eDimensions:\u003c\/strong\u003e 11 x 19 x 34.5 cm\u003cbr\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 10.65 kg                                                                                                                                        \u003cstrong\u003eNote:\u003c\/strong\u003e \u003cmeta charset=\"utf-8\"\u003eKeep it out of direct sunlight. Sustained UV breaks down the iron centres that produce the purple, and amethyst that fades does not come back\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eYou will receive the exact piece photographed.\u003c\/p\u003e","brand":"The Crystal Showroom","offers":[{"title":"Default Title","offer_id":58645027651928,"sku":null,"price":350.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0778\/4880\/5720\/files\/acb-c-1_b020926c-eaf2-4050-8c58-b6648d4df908.jpg?v=1791138601"},{"product_id":"amethyst-cathedral-b-natural-brazil","title":"Amethyst cathedral (B) — natural, Brazil","description":"\u003cp dir=\"ltr\"\u003eA cathedral with a thick agate band, a layer of quartz inside it, and purple only in the druzy at the surface.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eThat order is the whole history of the cavity, readable from the outside in. Silica arrived first and built the agate. Quartz grew next, clear, because there was no iron in the water at that point. Iron only turned up at the very end, which is why just the final skin of tiny crystals came out amethyst.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eThe back and base are cemented and the outside painted dark, standard for cut geodes. The crystal itself is untouched.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eMineral:\u003c\/strong\u003e \u003cmeta charset=\"utf-8\"\u003eAmethyst, the purple variety of quartz (SiO₂)\u003cbr\u003e\u003cstrong\u003eCrystal system:\u003c\/strong\u003e \u003cmeta charset=\"utf-8\"\u003eTrigonal\u003cbr\u003e\u003cstrong\u003eOrigin:\u003c\/strong\u003e \u003cmeta charset=\"utf-8\"\u003eBrazil\u003cbr\u003e\u003cstrong\u003eHardness:\u003c\/strong\u003e \u003cmeta charset=\"utf-8\"\u003e7 on the Mohs scale; hard, though individual crystal tips chip easily\u003cbr\u003e\u003cstrong\u003eTreatment:\u003c\/strong\u003e \u003cmeta charset=\"utf-8\"\u003eNone to the amethyst. Backing, base and exterior are cemented and painted, standard practice for cut geodes\u003cbr\u003e\u003cstrong\u003eDimensions:\u003c\/strong\u003e 23 x 10.5 x 30.5 cm\u003cbr\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 11.65 kg                                                                                                                                        \u003cstrong\u003eNote:\u003c\/strong\u003e \u003cmeta charset=\"utf-8\"\u003eKeep it out of direct sunlight. Sustained UV breaks down the iron centres that produce the purple, and amethyst that fades does not come back\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eYou will receive the exact piece photographed.\u003c\/p\u003e","brand":"The Crystal Showroom","offers":[{"title":"Default Title","offer_id":58645788918104,"sku":null,"price":380.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0778\/4880\/5720\/files\/acb-b-1_d053cdcf-1e0a-4a57-8f3d-5d93a2e8a361.jpg?v=1791139360"},{"product_id":"amethyst-cathedral-a-natural-brazil","title":"Amethyst cathedral (A) — natural, Brazil","description":"\u003cp dir=\"ltr\"\u003eCut from a geode that opened into two halves, and this is one of them.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eThe thick banded agate running round the opening is the oldest material on the piece, laid down long before any crystal formed. It built up against the cavity wall, which is why the pattern wraps the edge rather than sitting in the middle. Two of these exist and there will never be a third.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eThe back and base are cemented and the outside painted dark, which is done to every cathedral on the market and almost never mentioned. The crystal itself is untouched.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eMineral:\u003c\/strong\u003e \u003cmeta charset=\"utf-8\"\u003eAmethyst, the purple variety of quartz (SiO₂)\u003cbr\u003e\u003cstrong\u003eCrystal system:\u003c\/strong\u003e \u003cmeta charset=\"utf-8\"\u003eTrigonal\u003cbr\u003e\u003cstrong\u003eOrigin:\u003c\/strong\u003e \u003cmeta charset=\"utf-8\"\u003eBrazil\u003cbr\u003e\u003cstrong\u003eHardness:\u003c\/strong\u003e \u003cmeta charset=\"utf-8\"\u003e7 on the Mohs scale; hard, though individual crystal tips chip easily\u003cbr\u003e\u003cstrong\u003eTreatment:\u003c\/strong\u003e \u003cmeta charset=\"utf-8\"\u003eNone to the amethyst. Backing, base and exterior are cemented and painted, standard practice for cut geodes\u003cbr\u003e\u003cstrong\u003eDimensions:\u003c\/strong\u003e 24 x 15 x 31 cm\u003cbr\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 10.35 kg                                                                                                                                        \u003cstrong\u003eNote:\u003c\/strong\u003e \u003cmeta charset=\"utf-8\"\u003eKeep it out of direct sunlight. Sustained UV breaks down the iron centres that produce the purple, and amethyst that fades does not come back\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eYou will receive the exact piece photographed.\u003c\/p\u003e","brand":"The Crystal Showroom","offers":[{"title":"Default Title","offer_id":58645871034712,"sku":null,"price":340.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0778\/4880\/5720\/files\/acb-a-1_f74023b5-944a-41bb-8efd-42848a360313.jpg?v=1791139882"}],"url":"https:\/\/thecrystalshowroom.com\/collections\/geodes.oembed?page=2","provider":"The Crystal Showroom","version":"1.0","type":"link"}