metamorphic
Green Aventurine (or Serpentine / Green Quartz)
Quartzite with Fuchsite (SiO2 with K(Al,Cr)2(AlSi3O10)(OH)2)
AI-generated identification · may be incorrectHardness 6.5-7 on Mohs scale; pale jade-green to seafoam green; vitreous to waxy luster; trigonal crystal system (microcrystalline); specific gravity 2.64-2.69; faint shimmer (aventurescence) often visible due to mica inclusions.
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Physical properties
Hardness 6.5-7 on Mohs scale; pale jade-green to seafoam green; vitreous to waxy luster; trigonal crystal system (microcrystalline); specific gravity 2.64-2.69; faint shimmer (aventurescence) often visible due to mica inclusions.
Formation & geological history
Formed through the regional metamorphism of sandstone or silica-rich sediments containing chromium-rich mica (fuchsite), primarily in Precambrian metamorphic terranes.
Uses & applications
Popular for ornamental carvings, gemstone eggs, cabochons, polished decorative spheres, beads, and metaphysical/crystal healing uses.
Geological facts
Green aventurine is often called 'Indian Jade' due to its resemblance to nephrite or jadeite, though it is actually a variety of quartz/quartzite. The term 'aventurine' derives from the Italian 'a ventura', meaning 'by chance', originally referring to aventurine glass invented in Venice.
Field identification & locations
Identified by its pale to medium green tone, quartz-like hardness that can scratch glass, lack of cleavage, and subtle sugary or shimmering texture. Major sources include India, Brazil, Russia, and China.
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