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Obsidian - apache tear
North America
Obsidian, a natural volcanic glass, is a silica-rich mineraloid.Obsidian, a natural volcanic glass, is a silica-rich mineraloid. “Apache tears” are the spherical, black obsidian nodules that survive the obsidian-weathering process.
United States of America
Superior District, Pinal County, Arizona
4,1x3,4x2,7 cm
31.9g
