mineral

Tumbled quartz (likely rose quartz and milky quartz)

Quartz, silicon dioxide (SiO₂)

AI-generated identification · may be incorrect

Hardness 7 Mohs; vitreous luster; hexagonal crystal structure; no cleavage, with conchoidal fracture. The pink piece is likely rose quartz, while the cream-white piece is milky quartz, colored by microscopic inclusions and internal defects.

Identified August 18, 2026More mineral →

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Physical properties

Formation & geological history

Quartz crystallizes from silica-rich igneous and hydrothermal fluids; rose quartz commonly forms in pegmatites, while milky quartz occurs in veins. Quartz is found in rocks of many ages worldwide.

Uses & applications

Used for glass, electronics, abrasives, countertops, and construction aggregate; attractive rose quartz is used in carvings, beads, cabochons, and inexpensive jewelry.

Geological facts

Quartz is one of Earth’s most abundant minerals and is piezoelectric, producing an electrical charge under pressure. Rose quartz’s pink color is generally caused by microscopic mineral or fibrous inclusions rather than ordinary iron staining.

Field identification & locations

Identify by its glassy appearance, lack of cleavage, conchoidal fracture, and ability to scratch ordinary glass. Common sources include Brazil, Madagascar, India, the United States, and Namibia; these appear tumbled or shaped rather than naturally crystallized.