gemstone

Polished banded jasper (likely red jasper)

Microcrystalline quartz/chalcedony, SiO₂, colored by iron oxides; exact variety uncertain

AI-generated identification · may be incorrect

Opaque, polished egg-shaped piece with red, brown, gray, and cream bands; vitreous to waxy luster, Mohs hardness about 6.5–7, no visible cleavage. The fine-grained quartz structure is too small to distinguish by eye.

Identified October 3, 2026More gemstone →

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Physical properties

Formation & geological history

Jasper forms when silica-rich fluids fill cavities or replace sediment, with iron-rich impurities producing color and banding. Its geological age and exact source cannot be determined from the photo.

Uses & applications

Used for cabochons, beads, carvings, ornaments, and collectible polished specimens.

Geological facts

Jasper is an opaque variety of chalcedony; decorative banding reflects changes in mineral content during formation.

Field identification & locations

Commonly found in silica-rich veins and altered volcanic or sedimentary rocks worldwide. Identify by its opacity, hardness, and patterned bands; the egg shape and polish are human-made.