mineral

Tumbled yellow jasper

Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored mainly by iron oxides

AI-generated identification · may be incorrect

Smooth, rounded, opaque yellow-beige stone with a matte-to-waxy polish; Mohs hardness 6.5–7, trigonal quartz structure, no visible cleavage. The image does not allow reliable confirmation of its exact variety or composition.

Identified September 23, 2026More mineral →

Explore Tumbled yellow jasper in the encyclopedia →

Identify your own rocks.

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

App Store Google Play

Physical properties

Formation & geological history

Forms when silica-rich fluids fill cavities or replace material in rock, with iron compounds producing yellow and ochre hues. Jasper deposits occur in many geological ages and settings.

Uses & applications

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

Geological facts

Jasper is valued for its opaque colors and patterns, and its name covers a broad range of silica-rich ornamental materials.

Field identification & locations

The rounded shape and smooth finish indicate tumbling, not natural field form; yellow color alone cannot distinguish jasper from other stones. Jasper is found worldwide, including in Brazil, India, Madagascar, and the United States.