metamorphic
Fuchsite Quartzite (Aventurine / Verdite)
Quartzite with Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2 in SiO2 matrix)
AI-generated identification · may be incorrectHardness 6.5 - 7 on the Mohs scale, mottled emerald green to forest green color with shimmering flakes, vitreous to waxy polish luster, massive crystalline aggregate structure, specific gravity around 2.65 - 2.80.
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Physical properties
Hardness 6.5 - 7 on the Mohs scale, mottled emerald green to forest green color with shimmering flakes, vitreous to waxy polish luster, massive crystalline aggregate structure, specific gravity around 2.65 - 2.80.
Formation & geological history
Formed via regional metamorphism of chromium-rich sandstone or silica-rich hydrothermal alteration associated with ultramafic rocks.
Uses & applications
Commonly carved and polished into decorative shapes such as eggs, spheres, beads, cabochons, and ornamental figurines.
Geological facts
Fuchsite is a chromium-rich variety of muscovite mica, which imparts the vivid green color; when intimately mixed with quartz or serpentinite, it forms durable and beautiful stones historically used in carvings.
Field identification & locations
Distinguished by granular quartz texture interspersed with tiny, glittering chromium-green micaceous platelets. Major sources include Zimbabwe, South Africa, Brazil, and India.
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