mineral

Tumbled pale-green quartz, likely prasiolite or green aventurine

Quartz (SiO₂), with minor iron- or other mineral-related coloring

AI-generated identification · may be incorrect

Hardness 7 Mohs; translucent pale green, vitreous to frosted luster, and typically no visible cleavage. The rounded, abraded shape indicates tumbling; exact identification cannot be confirmed from the image alone, and it may also be colored glass or calcite without testing.

Identified September 2, 2026More mineral →

Explore Tumbled pale-green quartz, likely prasiolite or green aventurine in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Formation & geological history

Quartz forms in igneous, hydrothermal, and metamorphic environments over broad geological ages; green varieties commonly result from trace-element impurities or inclusions. Prasiolite is often heat-treated amethyst or citrine, while green aventurine contains fuchsite inclusions.

Uses & applications

Used as a lapidary, ornamental, and collector material; suitable for cabochons, beads, carvings, and decorative stones. Quartz is also important in glassmaking, electronics, and industrial abrasives.

Geological facts

Quartz has a six-sided crystal structure and conchoidal fracture. A steel file should not scratch it; glass-scratching ability and a specific gravity near 2.65 support quartz identification.

Field identification & locations

Common sources include Brazil, Uruguay, Madagascar, India, and the United States. Check hardness, streak (white), and specific gravity; calcite is softer and glass may show bubbles or lack quartz-like fracture.