mineral
Tumbled green aventurine (probable)
Quartz (SiO₂) with fuchsite or other green mica inclusions
AI-generated identification · may be incorrectMohs hardness about 6.5–7; pale green, translucent to opaque, with a vitreous-to-waxy luster and typically granular quartz structure. The rounded shape indicates tumbling; faint sparkle may appear when rotated in light.
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Physical properties
Mohs hardness about 6.5–7; pale green, translucent to opaque, with a vitreous-to-waxy luster and typically granular quartz structure. The rounded shape indicates tumbling; faint sparkle may appear when rotated in light.
Formation & geological history
Forms in quartz-rich metamorphic or hydrothermal veins, where chromium-bearing fuchsite or other minerals color the quartz; deposits are commonly Precambrian to younger. The specimen has been naturally cut or artificially tumbled and polished.
Uses & applications
Used for beads, cabochons, carvings, ornamental stone, and inexpensive jewelry; also sold as a decorative or metaphysical stone.
Geological facts
Aventurine’s characteristic aventurescence is caused by reflective mineral inclusions, most commonly mica. Similar pale-green material may instead be quartzite, serpentine, or commercial glass, so identification from the photo is provisional.
Field identification & locations
Look for quartz-like hardness, translucency, irregular green mica flecks, and inability to scratch it with a steel knife; it should scratch glass. Common sources include India, Brazil, Russia, and Tanzania.
