mineral
Green aventurine (tumbled)
Quartz, SiO₂, containing reflective fuchsite mica inclusions
AI-generated identification · may be incorrectMohs hardness 6.5–7; translucent to opaque green with a vitreous luster and typically no visible cleavage. Aventurine is microcrystalline quartz; mica inclusions may create a subtle sparkle (aventurescence).
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Physical properties
Mohs hardness 6.5–7; translucent to opaque green with a vitreous luster and typically no visible cleavage. Aventurine is microcrystalline quartz; mica inclusions may create a subtle sparkle (aventurescence).
Formation & geological history
Forms when silica-rich fluids crystallize as quartzite or quartz veins, with green mica incorporated during formation. Its geological age varies by deposit; the image alone cannot establish it.
Uses & applications
Used for beads, cabochons, carvings, decorative objects, and inexpensive jewelry.
Geological facts
The green color usually comes from chromium-bearing fuchsite mica rather than green quartz itself.
Field identification & locations
Often identified by its green color, quartz-like hardness, and occasional glittering inclusions; common sources include India, Brazil, and Russia. This polished specimen lacks enough visible detail to confirm its identity definitively.
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