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