mineral

Clear quartz tumbled stone

Quartz (silicon dioxide, SiO₂)

AI-generated identification · may be incorrect

Transparent to translucent, colorless, and vitreous with rounded, polished surfaces. Mohs hardness 7; trigonal crystal structure, no cleavage, conchoidal fracture, and specific gravity about 2.65.

Identified September 8, 2026More mineral →

Explore Clear quartz tumbled stone in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Transparent to translucent, colorless, and vitreous with rounded, polished surfaces. Mohs hardness 7; trigonal crystal structure, no cleavage, conchoidal fracture, and specific gravity about 2.65.

Formation & geological history

Likely natural quartz that was mechanically tumbled and polished; quartz formed in igneous, hydrothermal, and metamorphic environments over geologic time. The photograph cannot establish a precise age or locality.

Uses & applications

Used as a decorative and collectible stone, in jewelry, and industrially for glass, abrasives, electronics, and optical components.

Geological facts

Clear quartz is commonly called rock crystal. Internal fractures, bubbles, or surface reflections can resemble inclusions; a true quartz specimen scratches ordinary glass but should not be confused with man-made glass.

Field identification & locations

Identify by its glassy luster, rounded conchoidal surfaces, hardness, and lack of cleavage. Common sources include Brazil, Madagascar, the United States, and many hydrothermal vein districts.