mineral

Quartz crystal cluster

Quartz (silicon dioxide, SiO₂)

AI-generated identification · may be incorrect

Usually colorless to milky white, with vitreous luster, hexagonal prismatic crystals, and no true cleavage; Mohs hardness 7, specific gravity about 2.65. The specimen appears to be a natural cluster, possibly with minor surface coatings or inclusions.

Identified August 25, 2026More mineral →

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Physical properties

Formation & geological history

Quartz crystallizes from silica-rich hydrothermal fluids, cavities in volcanic rocks, or pegmatites over broad geological timescales, commonly from Paleozoic to recent formations. The image alone cannot establish its exact age or locality.

Uses & applications

Used for glass, electronics, optical instruments, abrasives, and engineered stone; attractive clusters are sold as décor and collectible mineral specimens. It is generally more valuable for aesthetics than gem quality.

Geological facts

Quartz is one of Earth’s most abundant minerals and has several varieties, including amethyst, citrine, and smoky quartz. Its crystal faces commonly form six-sided prisms capped by pyramidal terminations.

Field identification & locations

Identify it by its glassy luster, pointed hexagonal crystals, hardness sufficient to scratch ordinary glass, and lack of prominent cleavage. Common sources include Brazil, Madagascar, China, the United States, and Morocco.