mineral

Green aventurine (rough)

Quartz (SiO₂) containing green fuchsite mica inclusions; identification is tentative from the image

AI-generated identification · may be incorrect

Green, opaque to translucent, with a granular sparkle and uneven fracture; quartz has hardness 7, vitreous luster, and trigonal crystal structure, with no cleavage. Specific gravity is about 2.6–2.7.

Identified October 10, 2026More mineral →

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Physical properties

Formation & geological history

Forms when silica-rich fluids crystallize as quartz with dispersed chromium-bearing mica; these deposits commonly occur in metamorphic rocks. The specimen’s age and exact formation setting cannot be determined from the image.

Uses & applications

Used for beads, cabochons, carvings, and decorative stone; rough pieces are also collected.

Geological facts

Aventurine’s characteristic glitter, called aventurescence, comes from reflective mineral inclusions; fuchsite commonly gives it a green color.

Field identification & locations

Look for a green quartz-like mass with tiny reflective flecks and hardness sufficient to scratch glass; commonly sourced from India, Brazil, and Russia. The image alone cannot confirm the mineral inclusions.