A light tan druse of intergrown classic saddle shaped crystals of Siderite covers the majority of a Fluorite specimen, with sparsely scattered crystals of metallic yellow Chalcopyrite. From the Burtree Pasture Mine, Weardale, England. The Fluorite crystals measure to 2.6cm on edge having tint of gemmy yellow to them. A secondary deposition of Fluorite has formed on the Siderite in some ares.