gemstone

Tumbled red jasper

Jasper, an opaque microcrystalline variety of quartz (SiO₂)

AI-generated identification · may be incorrect

Typically Mohs 6.5–7; opaque brick-red to reddish brown with a vitreous to waxy polish. Microcrystalline quartz has no visible crystal faces and lacks distinct cleavage; the pieces are rounded by tumbling. The image alone cannot confirm whether color is natural or enhanced.

Identified October 8, 2026More gemstone →

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Physical properties

Formation & geological history

Jasper forms when silica-rich fluids fill or replace rock, with iron oxides providing red coloration; deposits occur in many ages and geological settings. These specimens have been mechanically tumbled and polished.

Uses & applications

Commonly used for beads, cabochons, carvings, and decorative pieces; also collected as an inexpensive ornamental stone.

Geological facts

Jasper is a descriptive gem material rather than a single strictly defined mineral species; its patterns and colors vary with impurities.

Field identification & locations

Look for opaque, fine-grained material with a smooth polish and red coloration; it is commonly sold as tumbled stone from deposits worldwide, including India, Brazil, and the United States.