Marcasite Quartz Calcite Cluster from Russia Blue Kyanite these marine invertebrates had chambered

these marine invertebrates had chambered shells for buoyancy

from the early Cambrian to the end of the Permian period

This item is 3” x 3” and weighs 4

25“ and weighs 0

Marcasite Quartz Calcite Cluster from Russia Blue Kyanite these marine invertebrates had chamberedThis 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 1. 5 x 1. 5 and weighs 1. 95 oz