mineral

Blue aventurine quartz (likely blue quartz)

Quartz, SiO₂, with blue color from microscopic inclusions such as dumortierite or amphibole

AI-generated identification · may be incorrect

Small polished/tumbled specimen; blue with whitish internal mottling, vitreous luster, and no obvious cleavage. Mohs hardness 7; trigonal crystal structure; specific gravity about 2.65.

Identified September 18, 2026More mineral →

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Physical properties

Small polished/tumbled specimen; blue with whitish internal mottling, vitreous luster, and no obvious cleavage. Mohs hardness 7; trigonal crystal structure; specific gravity about 2.65.

Formation & geological history

Forms in silica-rich hydrothermal veins and metamorphic rocks, with color-producing inclusions crystallizing during mineral growth. Geological ages vary widely by locality.

Uses & applications

Used mainly as a decorative lapidary stone, cabochon, bead, or collectible; generally not a high-value gemstone.

Geological facts

The specimen appears tumbled and polished, so crystal faces and natural fracture surfaces are absent. It may also be marketed as blue aventurine, though true aventurine typically shows visible glitter from reflective inclusions.

Field identification & locations

Identify by its glassy luster, hardness, conchoidal fracture, and resistance to scratching by steel; blue sodalite or dyed stones may be softer or show stronger color concentration. Common sources include Brazil, India, Russia, and the United States.