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5” and weighs 18
56" and weighs 3
The fool's gold of fossils
The cubic form is more rare and found only in Navajún
Marcasite Quartz Calcite Cluster from Russia smokey quartz 5” and weighs 18This beautiful cluster from Russia features shimmering marcasite, quartz, and calcite that fluoresces under UV light. Marcasite is made of iron sulfide, with the same chemical formula as pyrite, though it forms in a different crystal structure. It typically appears metallic and pale bronze with a bright reflective luster. This item is 2. 5 x 1. 75 and weighs 1. 5 oz
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