mineral

Tumbled iron-stained quartz or jasper

Quartz (SiO₂), likely colored by iron oxides; exact identification is uncertain from the image

AI-generated identification · may be incorrect

Opaque, rounded specimen with rusty orange-brown coloration and a slightly glossy, mottled surface. Quartz has Mohs hardness 7, vitreous luster, and a trigonal crystal structure; no obvious cleavage.

Identified October 16, 2026More mineral →

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Physical properties

Opaque, rounded specimen with rusty orange-brown coloration and a slightly glossy, mottled surface. Quartz has Mohs hardness 7, vitreous luster, and a trigonal crystal structure; no obvious cleavage.

Formation & geological history

Likely a naturally occurring quartz-rich pebble stained by iron oxides, then mechanically tumbled or polished. Quartz forms in many geological settings and spans a wide range of ages.

Uses & applications

Commonly used for lapidary work, inexpensive jewelry, ornaments, and rock collections.

Geological facts

Iron oxides such as hematite or goethite can stain quartz yellow, orange, and brown.

Field identification & locations

Look for hardness near 7 and lack of cleavage; a steel file generally will not scratch quartz easily. Quartz occurs worldwide, but the specific locality cannot be determined from this photo.