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5" and weighs 3
This polished specimen displays an ancient algal colony fossil from the Pennsylvanian Period (approximately 323–299 million years ago)
and can display a gemmy transparent light tan/yellow color
formed in oxidized and weathered copper deposits
These Barite Sand Concretions from Morocco
Marcasite Quartz Cluster from Russia Mica 5" and weighs 3This 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
US$ 50.00
US$ 893.00
US$ 759.50
US$ 50.00
US$ 211.50
