Marcasite Quartz Calcite Cluster from Russia agate Trilobites are an extinct class

Trilobites are an extinct class of marine arthropods that thrived for nearly 270 million years

semi-translucent calcite crystal that can be found in the Tri-State Mining District

This item is 5” x 3” and weighs 40oz

12” and weighs 22

they are transparent and nearly colorless

Marcasite Quartz Calcite Cluster from Russia agate Trilobites are an extinct classThis 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 x 1 and weighs 2 oz