mineral

Tumbled green aventurine (likely)

Quartz, SiO₂, with fuchsite mica inclusions

AI-generated identification · may be incorrect

Mohs hardness 6.5–7; pale to medium green, translucent to opaque, with a vitreous-to-waxy luster and no obvious cleavage. The rounded shape and smooth surface indicate tumbling; subtle sparkle may appear under bright light.

Identified August 30, 2026More mineral →

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Physical properties

Formation & geological history

Forms when silica-rich fluids crystallize quartz containing chromium-bearing fuchsite or other green mineral inclusions, commonly in metamorphic or hydrothermal settings. The pictured piece is human-polished rather than naturally weathered.

Uses & applications

Used for inexpensive cabochons, beads, carvings, ornaments, and metaphysical specimens; it is not usually used as a major construction stone.

Geological facts

Aventurine’s green color commonly comes from fuchsite, while orange, blue, and brown varieties contain different inclusions. It can resemble jade, but aventurine is generally harder and commonly shows glittery inclusions.

Field identification & locations

Common sources include India, Brazil, Russia, and Tanzania. Confirm with a loupe for mica sparkle and a hardness test on an inconspicuous area; avoid confusing it with dyed glass or green quartzite.