{"product_id":"natural-stalagmitic-agate-with-cristobalite-x-2-from-didi-madagascar","title":"Natural Stalagmitic Agate with Cristobalite x 2 From Didi, Madagascar","description":"\u003cp\u003e\u003cb\u003eA NOTE FROM NICK\u003cbr\u003e\u003c\/b\u003eA pair of natural stalagmitic Agate with Cristobalite formations growing off the surface that you really don't see every day. The combination of the banded Agate base and the wild, contorted Cristobalite habits makes each piece one of a kind.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003ePRODUCT DESCRIPTION \u003cbr\u003e\u003c\/b\u003e\u003cb\u003eStalagmitic Agate with Cristobalite\u003cbr\u003e\u003c\/b\u003eMalagasy Stalagmitic Agate with Cristobalite, Stalagmitic Agate forms through the slow deposition of silica-rich fluids within volcanic cavities, building upward in layered concentric banding to produce freestanding stalagmite-like formations with a distinctive ringed cross-section. Cristobalite, a rare high-temperature polymorph of silicon dioxide forming at temperatures above 1470°C, has developed across the surface of these Agate stalagmites in contorted, kinked crystal habits that deviate dramatically from typical prismatic growth. The result is a highly unusual combination specimen the calm, banded regularity of the Agate base contrasted against the erratic, twisted Cristobalite formations above. Madagascar continues to produce some of the most mineralogically surprising combination specimens in the world, and these sit firmly in that category.\u003c\/p\u003e\n\u003cp style=\"line-height: normal;\" class=\"MsoNormal\"\u003e\u003cb\u003eASSOCIATED MINERALS \u003cbr\u003e\u003c\/b\u003eAgate, Cristobalite, Quartz\u003cbr\u003e\u003c\/p\u003e\n\u003cp style=\"line-height: normal;\" class=\"MsoNormal\"\u003e\u003cb\u003eASSOCIATED FEATURES \u003cbr\u003e\u003c\/b\u003eTrigonal, Botryoidal, Drusy, Microcrystalline\u003cbr\u003e\u003c\/p\u003e\n\u003cp style=\"line-height: normal;\" class=\"MsoNormal\"\u003e\u003cb\u003eASSOCIATED COLOURS \u003cbr\u003e\u003c\/b\u003eWhite, Grey, Brown, Cream, Clear\u003cbr\u003e\u003c\/p\u003e\n\u003cp style=\"line-height: normal;\" class=\"MsoNormal\"\u003e\u003cb\u003eMOHS HARDNESS SCALE\u003ci\u003e\u003cbr\u003e\u003c\/i\u003e\u003c\/b\u003e6 - 7\u003cbr\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003ePRODUCT DATA \u003cbr\u003e\u003c\/b\u003eLocality = Didi, Madagascar\u003cbr\u003eGrade = Very Good to A Grade\u003cspan style=\"mso-spacerun: yes;\"\u003e                      \u003c\/span\u003e\u003cbr\u003eSize = 172 - 184 mm\u003c\/p\u003e","brand":"AGATE","offers":[{"title":"Default Title","offer_id":50350285095105,"sku":"185-298-260623BM","price":2828.0,"currency_code":"ZAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2066\/6451\/files\/185298_16.jpg?v=1782477389","url":"https:\/\/www.toprocks.com\/products\/natural-stalagmitic-agate-with-cristobalite-x-2-from-didi-madagascar","provider":"Toprock Gemstones and Minerals ","version":"1.0","type":"link"}