mineral

Blue-green aventurine beads (likely dyed or treated quartz)

Quartz, SiO₂; aventurine is quartz containing fine mineral inclusions

AI-generated identification · may be incorrect

Polished, opaque-to-translucent blue-green beads with a vitreous-to-waxy luster. Quartz hardness is 7 Mohs, with a trigonal crystal structure and no cleavage; bead color alone cannot confirm aventurine or rule out treatment.

Identified September 27, 2026More mineral →

Explore Blue-green aventurine beads (likely dyed or treated quartz) in the encyclopedia →

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Physical properties

Formation & geological history

Quartz forms in silica-rich veins and cavities as mineral-bearing fluids cool; aventurine’s inclusions develop during crystallization. Quartz deposits occur in many geological ages and settings worldwide.

Uses & applications

Used for jewelry and ornamental objects; quartz also has extensive industrial use in glass, abrasives, and electronics.

Geological facts

Natural aventurine is commonly green, while vivid blue-green material may be dyed or otherwise treated. The photo does not reveal the beads’ exact material or treatment.

Field identification & locations

Check for natural sparkle from inclusions, color concentrated in cracks or drill holes, and consistent hardness; a gemological test is needed for reliable identification. Quartz and aventurine are found worldwide, including Brazil, India, and Russia.