mineral

Quartz crystal cluster (likely iron-stained quartz)

Quartz, silicon dioxide (SiO₂), with possible iron-oxide inclusions

AI-generated identification · may be incorrect

Typically Mohs hardness 7, vitreous luster, white to smoky or brown color, hexagonal crystal structure, and indistinct cleavage; specific gravity about 2.65. The specimen appears to be a natural cluster of translucent, drusy-to-prismatic crystals, though image resolution limits certainty.

Identified August 25, 2026More mineral →

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Physical properties

Formation & geological history

Forms when silica-rich hydrothermal fluids or groundwater deposit quartz in cavities, veins, and fractures; iron oxides can produce brown-orange staining. Quartz ranges from Precambrian to modern in age and occurs worldwide.

Uses & applications

Used for glass, electronics, abrasives, and ornamental specimens; attractive clusters are collected or used in decor rather than jewelry.

Geological facts

Quartz is one of Earth’s most abundant minerals and is the defining mineral of many geodes and hydrothermal veins.

Field identification & locations

Identify by testing scratch resistance against ordinary glass, observing vitreous luster and crystal faces, and checking for conchoidal fracture; common sources include Brazil, Madagascar, Morocco, China, and the United States. The other visible objects may be additional tumbled or polished stones.