mineral

Tumbled quartz (likely milky quartz)

Quartz, silicon dioxide (SiO₂)

AI-generated identification · may be incorrect

Pale translucent, glassy to waxy luster, uneven fracture, and no visible cleavage; Mohs hardness 7, trigonal crystal structure, specific gravity about 2.65. The rounded shape indicates tumbling or natural abrasion, and surface cloudiness may reflect fluid inclusions or microfractures.

Identified September 21, 2026More mineral →

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Physical properties

Formation & geological history

Quartz crystallizes from silica-rich igneous and hydrothermal fluids and commonly occurs in veins, pegmatites, and sedimentary gravels. Its exact geological age cannot be determined from the photograph; quartz spans nearly all geological periods.

Uses & applications

Used for abrasives, glass, electronics, ceramics, and ornamental stone; attractive transparent pieces may be sold as low-cost gemstone or metaphysical specimens.

Geological facts

Quartz is one of Earth’s most abundant minerals and is piezoelectric. This specimen could also be pale rose quartz or another light-colored quartz variety, but color alone is insufficient for precise identification.

Field identification & locations

Common worldwide, including Brazil, Madagascar, India, and the United States. Confirm with a scratch test against glass (quartz should scratch it), while avoiding damage to polished specimens; acid testing is unnecessary.