mineral

Iron-stained jasper (likely)

Microcrystalline quartz, SiO₂, colored by iron oxides

AI-generated identification · may be incorrect

Opaque, irregular specimen with yellow, red, and brown areas; earthy to dull luster. Quartz hardness is about 7 Mohs, but the image alone cannot establish composition or crystal texture.

Identified October 4, 2026More mineral →

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Physical properties

Opaque, irregular specimen with yellow, red, and brown areas; earthy to dull luster. Quartz hardness is about 7 Mohs, but the image alone cannot establish composition or crystal texture.

Formation & geological history

Jasper forms when silica-rich fluids or sediments become silicified; iron oxides create red and yellow colors. Its age and specific formation environment cannot be determined from the photo.

Uses & applications

Jasper is used for cabochons, beads, ornaments, and lapidary collecting; this rough piece appears suitable mainly for display or cutting if its material is confirmed.

Geological facts

Yellow coloration can come from goethite or other hydrated iron oxides, while red tones commonly reflect hematite.

Field identification & locations

The mottled iron-oxide colors suggest jasper, but similar coloring occurs in other iron-rich rocks. Check for a hard, non-cleaving surface and a scratch test; common jasper sources include Brazil, India, Australia, and the western United States.