{"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","url":"https:\/\/thecrystalshowroom.com\/products\/amethyst-cathedral-b-natural-brazil","provider":"The Crystal Showroom","version":"1.0","type":"link"}