mineral

Tumbled yellow-orange stone, likely yellow jasper

Jasper, a microcrystalline variety of quartz (SiO₂); exact identification is uncertain from the photo

AI-generated identification · may be incorrect

Opaque, golden-orange, smoothly polished, with subtle streaks and a waxy-to-vitreous luster. Jasper is typically Mohs 6.5–7 and has a fine-grained quartz structure; the pictured stone’s hardness cannot be confirmed visually.

Identified October 13, 2026More mineral →

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Physical properties

Formation & geological history

Jasper forms when silica-rich fluids fill cavities or replace rock, with iron oxides producing its color. Deposits occur in rocks of many geological ages.

Uses & applications

Commonly tumbled for jewelry, beads, and decorative objects; jasper is also collected as an ornamental stone.

Geological facts

Jasper is an opaque form of chalcedony, unlike typically translucent agate; iron-bearing inclusions create many of its colors and patterns.

Field identification & locations

Its uniform opacity and fine, patterned surface are consistent with tumbled jasper, but yellow calcite or dyed stone can look similar. Hardness and a fresh-surface examination would help distinguish them.