Marcasite Quartz Calcite Cluster from Russia $100-$150 5" and weighs 4

5" and weighs 4

brittle mineral composed of lead

Stromatolites are layered colonial sedimentary structures predominantly formed by photosynthetic microorganisms

and smokey quartz

The distinctive flattened crystal habit gives the appearance of “nail heads

Marcasite Quartz Calcite Cluster from Russia $100-$150 5" and weighs 4This 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 2. 25 and weighs 3. 65 oz