Sphalerite with Quartz

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Intergrown flattish crystals of Sphalerite form a small plate with a dazzling metallic lustre and minor Quartz attached at both ends. The specimen is from a somewhat obscure locality named Kranicher Gang, which worked the well documented Burgstatt veins close to the town of Clausthal-Zellerfeld in Lower Saxony, Germany. The Sphalerite is iron rich and hence the crystals appear coal-black, but some areas, both on the top and base, grade to almost pure Sphalerite, of a beautiful translucent and tangy citrus yellowish-lime green.\n