mineral

Green aventurine (likely)

Quartz, SiO₂, with fuchsite or other green inclusions

AI-generated identification · may be incorrect

Translucent pale green, vitreous to slightly waxy luster, hardness about 7 Mohs, conchoidal fracture, and no prominent cleavage; the rounded pieces appear polished or tumbled. The granular green color and subtle internal sparkle are consistent with aventurine quartz, though serpentine or glass cannot be ruled out from…

Identified September 16, 2026More mineral →

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Physical properties

Formation & geological history

Forms when silica-rich fluids crystallize quartz in metamorphic or hydrothermal environments, commonly with chromium-bearing fuchsite mica; deposits are mainly Paleozoic to Precambrian in age. Common sources include India, Brazil, Russia, Tanzania, and China.

Uses & applications

Used for beads, spheres, carvings, cabochons, ornamental stone, and inexpensive jewelry; larger material is used decoratively rather than structurally.

Geological facts

Aventurine’s characteristic aventurescence is caused by reflective mineral inclusions, especially mica. Confirm with a hardness test and close inspection for glittering inclusions; glass is typically softer or shows bubbles.

Field identification & locations

Field identification favors green quartz with scattered sparkle and hardness near 7, unlike softer serpentine (about 3–6). Avoid scratching polished surfaces; an unimportant edge can be tested discreetly.