mineral

Quartz cluster (likely druzy quartz)

Quartz, silicon dioxide (SiO₂)

AI-generated identification · may be incorrect

White, translucent-to-transparent microcrystals with a vitreous luster; Mohs hardness 7, trigonal crystal structure, indistinct cleavage, conchoidal fracture, and specific gravity about 2.65. The yellow-brown patches may be iron-oxide staining or attached matrix.

Identified August 28, 2026More mineral →

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Physical properties

Formation & geological history

Quartz crystallizes from silica-rich hydrothermal fluids or cavities in volcanic and sedimentary rocks; the specimen’s exact age and locality cannot be determined from the image. Druzy crystals commonly line geodes, fractures, and vugs.

Uses & applications

Used for decorative specimens, jewelry, carvings, countertops, glass, electronics, and industrial abrasives. This small natural cluster is primarily a collector or decorative item.

Geological facts

Quartz is one of Earth’s most abundant minerals and is commonly associated with calcite, fluorite, and sulfide ores. Its crystals often form six-sided prisms, though druzy quartz consists of tiny sparkling crystals.

Field identification & locations

Identify it by its glassy sparkle, lack of cleavage, hardness sufficient to scratch ordinary glass, and white translucent crystals; avoid testing valuable specimens destructively. Common sources include Brazil, Uruguay, Mexico, Morocco, and the United States.