{"product_id":"calcite-with-marcasite-brushy-creek-mine-missouri-usa-1","title":"Dragon Scale Calcite with Marcasite – Brushy Creek Mine, Missouri, USA","description":"\u003cp\u003eA striking \u003cstrong\u003ecalcite with marcasite\u003c\/strong\u003e specimen from the \u003cstrong\u003eBrushy Creek Mine, Reynolds County, Missouri, USA\u003c\/strong\u003e, \u003c\/p\u003e\n\u003cp\u003eOne of two amazing \u003cstrong\u003e\"dragon scale\" calcites\u003c\/strong\u003e we have available. This is a large, cabinet-sized specimen weighing just over \u003cstrong\u003e7 kg\u003c\/strong\u003e from the famous late 1980s find from within the \u003cstrong\u003eViburnum Trend \u003c\/strong\u003edistrict. The waxy smoke gray is the final calcite crystal growth that encased sulphides like marcasite. The sulphides had grown over the first generation of calcite crystals. Where exposed, the sulphides have a terrific, metallic  iridescence and add a lot of sparkle to the giant calcites. I love the overall erratic, yet aesthetic cluster of scalenohedral-shaped calcites. There is only minor nicks on a few crystal tips although there are several crystal contacts where they naturally grew into an obstruction, such as a rock wall. The entire piece appears to be a \"floater\" with minor evidence of contact points (the base is photographed to show the lack of contacts but does not have any larger crystals).\u003c\/p\u003e\n\u003cp\u003eThe specimen has excellent visual depth, with large dominant calcite crystals surrounded by smaller secondary crystals and extensive marcasite coverage. Its combination of commanding crystal size, brilliant metallic contrast and documented older provenance makes it an especially distinctive Brushy Creek specimen and a strong centerpiece for a serious cabinet collection.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMinerals:\u003c\/strong\u003e Calcite, Marcasite\u003cbr\u003e\u003cstrong\u003eLocality:\u003c\/strong\u003e Brushy Creek Mine, Reynolds County, Missouri, USA\u003cbr\u003e\u003cstrong\u003eCrystal System:\u003c\/strong\u003e Calcite – Trigonal; Marcasite – Orthorhombic\u003cbr\u003e\u003cstrong\u003eMineral Class:\u003c\/strong\u003e Carbonate; Sulfide\u003cbr\u003e\u003cstrong\u003eProvenance:\u003c\/strong\u003e Ex Bill Rouslin #454\u003cbr\u003e\u003cstrong\u003eDimensions:\u003c\/strong\u003e 24 × 23 × 9 cm\u003c\/p\u003e","brand":"Rocky Mountain Minerals and Fossils","offers":[{"title":"Default Title","offer_id":52931326574874,"sku":null,"price":3000.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0679\/6011\/1386\/files\/Calcite-Marcasite-Brushy-Creek-Mine-Missouri10.jpg?v=1790102756","url":"https:\/\/keithrocks.ca\/products\/calcite-with-marcasite-brushy-creek-mine-missouri-usa-1","provider":"Rocky Mountain Minerals and Fossils","version":"1.0","type":"link"}