mineral

Tumbled quartz (likely milky/rose quartz)

Quartz, silicon dioxide (SiO₂)

AI-generated identification · may be incorrect

Hardness 7 Mohs; translucent pale pink, cream, and gray with a vitreous-to-waxy luster. Quartz is trigonal, has no cleavage, conchoidal fracture, and specific gravity about 2.65.

Identified August 19, 2026More mineral →

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Physical properties

Hardness 7 Mohs; translucent pale pink, cream, and gray with a vitreous-to-waxy luster. Quartz is trigonal, has no cleavage, conchoidal fracture, and specific gravity about 2.65.

Formation & geological history

Formed when silica-rich fluids crystallized in igneous or metamorphic environments, commonly in veins and cavities; its geological age depends on locality and may range from millions to billions of years. The rounded shape indicates human tumbling or natural abrasion.

Uses & applications

Used as a decorative and lapidary material, ornamental stone, and minor gemstone; quartz is also important in glass, ceramics, electronics, and construction aggregate. This specimen has modest collector value.

Geological facts

The cloudy appearance results from microscopic fluid inclusions, fractures, or other mineral inclusions; the pink tint may reflect trace impurities or irradiation-related color centers. Quartz is one of Earth’s most abundant minerals.

Field identification & locations

Identify it by its glassy luster, lack of cleavage, conchoidal fractures, and ability to scratch ordinary glass; a steel blade should not scratch it. Common worldwide, especially in Brazil, Madagascar, the United States, and alpine vein deposits.