mineral

Tumbled quartz-rich stone, likely druzy quartz or quartzite

Quartz (SiO₂), possibly quartzite with iron-oxide staining

AI-generated identification · may be incorrect

Small rounded specimen with a white to honey-colored exterior and a brown, sparkly granular top. Quartz has Mohs hardness 7, vitreous luster, no cleavage, conchoidal fracture, and a hexagonal crystal structure; the image does not clearly resolve individual crystals or confirm the matrix.

Identified August 11, 2026More mineral →

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Physical properties

Formation & geological history

Likely formed when silica crystallized in a cavity or cemented quartz grains in metamorphosed sandstone; brown coloration commonly comes from iron oxides. Exact age and locality cannot be determined from the photograph.

Uses & applications

Quartz is used in glass, ceramics, abrasives, electronics, and countertops; attractive druzy pieces are sold as low-cost decorative or jewelry specimens.

Geological facts

The glittering surface may be druzy quartz, while the rounded shape suggests tumbling or natural abrasion. A steel nail should not scratch quartz, though surface coatings or softer matrix may scratch.

Field identification & locations

Look for glassy luster, translucent edges, and hardness near 7; vinegar will not fizz. Common sources include Brazil, Madagascar, India, and the United States. Identification remains tentative without testing or a fresh surface.