Marcasite Quartz Cluster from Russia Mica formed in oxidized and weathered

formed in oxidized and weathered copper deposits

It is an important rock-forming mineral present in igneous

This polished specimen displays an ancient algal colony fossil from the Pennsylvanian Period (approximately 323–299 million years ago)

72" and weighs 101 grams

Marcasite Quartz Cluster from Russia Mica formed in oxidized and weatheredThis beautiful cluster from Russia features shimmering marcasite and quartz. 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. 75 x 1. 25 and weighs 1. 15 oz