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These well-developed, mostly twinned, deep brown crystals of Cassiterite from Viloco mine, Bolivia are extremely lustrous and display incredible translucency under a strong light. Measuring to 1.6 cm across these crystals are evenly distributed over a large miniature specimen made up of silvery grey crystalline Arsenopyrite and Quartz/Limonite matrix. This is exceptionally gemmy Cassiterite. Ex Professor Werner Paar collection.
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