mineral

Tumbled green aventurine quartz

Aventurine quartz — microcrystalline quartz (SiO₂) with fuchsite or other mica inclusions

AI-generated identification · may be incorrect

Typically pale to medium green, opaque to translucent, with a soft glittery aventurescence; vitreous to waxy luster and no obvious cleavage. Hardness about 6.5–7 Mohs; the rounded shape indicates tumbling or polishing.

Identified August 30, 2026More mineral →

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Physical properties

Formation & geological history

Forms when silica-rich fluids crystallize quartz containing dispersed green fuchsite mica, usually in metamorphic or hydrothermal settings. The specimen’s exact geological age and locality cannot be determined from the image.

Uses & applications

Commonly used for beads, carvings, cabochons, ornaments, and inexpensive decorative stone; less commonly used as aggregate. It is popular in lapidary and crystal collecting.

Geological facts

Aventurine is identified by reflective mica platelets that produce aventurescence when rotated in light; weak sparkle may be difficult to see on pale pieces.

Field identification & locations

Common sources include India, Brazil, Russia, Tanzania, and China. Distinguish it from green glass by its natural granular texture, uneven sparkle, and quartz-like hardness; definitive identification may require microscopy or testing.