Marcasite Quartz Calcite Cluster from Russia Blue Kyanite from the early Cambrian to

from the early Cambrian to the end of the Permian period

coral-like structures called flos-ferri

This item is 12” x 7” and weighs 40

these marine invertebrates had chambered shells for buoyancy

25“ and weighs 0

Marcasite Quartz Calcite Cluster from Russia Blue Kyanite from the early Cambrian toThis 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