mineral

Tumbled green aventurine quartz

Quartz, SiO₂, with fuchsite or other green mica inclusions

AI-generated identification · may be incorrect

Typically translucent to opaque green, with vitreous luster and a smoothly polished surface; hardness about 7 Mohs, trigonal crystal structure, no cleavage, and specific gravity near 2.65. The faint cloudy or sparkly areas are characteristic mica inclusions.

Identified August 29, 2026More mineral →

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Physical properties

Formation & geological history

Forms when silica-rich fluids crystallize quartz with chromium-bearing fuchsite mica, commonly in metamorphic rocks; deposits are generally Precambrian to younger. This specimen has been cut and tumbled, obscuring its original texture.

Uses & applications

Used for cabochons, beads, carvings, jewelry, ornamental objects, and inexpensive metaphysical collectibles; it has little structural or industrial use beyond quartz aggregate.

Geological facts

Aventurine’s name refers to aventurescence, the glittering reflection produced by mineral inclusions, although this piece appears relatively low in sparkle. Green aventurine is often confused with jade, but it is softer-looking and lacks jade’s toughness and fibrous interlocking texture.

Field identification & locations

Common sources include India, Brazil, Russia, Tanzania, and China. Identify it by green quartz hardness, conchoidal fracture, and occasional mica sparkle; glass imitations are usually softer and may show bubbles.