mineral

Yellow jasper-like chalcedony

Microcrystalline quartz (SiO₂), likely iron-stained jasper or chert

AI-generated identification · may be incorrect

Opaque mustard-yellow to orange, earthy/waxy luster, irregular fracture, and no visible cleavage; quartz hardness is about 6.5–7 Mohs, with specific gravity near 2.6. Dark green-gray patches may be chlorite, other inclusions, or surface staining.

Identified August 13, 2026More mineral →

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Physical properties

Formation & geological history

Formed when silica-rich fluids filled cavities or replaced sedimentary/volcanic material, with iron oxides producing the yellow coloration. Exact age and locality cannot be determined from the photograph.

Uses & applications

Used as decorative stone, cabochons, beads, carvings, and polished specimens; ordinary pieces have little industrial value compared with high-quality ornamental jasper.

Geological facts

The image is consistent with jasper or iron-stained chert, but visual identification alone cannot distinguish these confidently from yellow chalcedony or weathered quartzite.

Field identification & locations

Test for glass-scratching hardness, inspect a fresh fracture for a smooth waxy texture, and check for absent cleavage; avoid acid testing, since quartz does not fizz. Common sources include volcanic and sedimentary terrains worldwide, including the western United States, Brazil, Australia, and India.