gemstone

Polished striped jasper

Jasper, an opaque microcrystalline variety of quartz (SiO₂), with iron-oxide and clay-mineral inclusions

AI-generated identification · may be incorrect

Hardness about 6.5–7 Mohs; opaque brown, tan, and reddish bands; vitreous to waxy luster after polishing; cryptocrystalline quartz with no visible cleavage and conchoidal fracture. Specific gravity is approximately 2.55–2.70.

Identified September 15, 2026More gemstone →

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At a glance

Common name: Polished striped jasper
Scientific name: Jasper, an opaque microcrystalline variety of quartz (SiO₂), with iron-oxide and clay-mineral inclusions
Category: gemstone
Identified: September 15, 2026
Method: Standard

AI Estimated Value

About $5–$30 for a polished palm-sized cabochon or worry stone; $30–$100+ for unusually attractive, large, or locality-specific material.

Not an official valuation

AI estimate for general interest only — not an appraisal. Actual value depends on condition, provenance, and market demand. Verify with a professional before buying, selling, or insuring.

This identification was generated by AI and may contain errors. Verify important details before relying on them — and never use an AI result to judge whether a specimen is safe to handle. Read the full disclaimer

Physical properties

Formation & geological history

Forms when silica-rich groundwater fills cavities or replaces volcanic and sedimentary material, while iron oxides create the red-brown banding. Jasper deposits formed in many geological ages, commonly in volcanic terrains.

Uses & applications

Used for cabochons, beads, carvings, ornaments, and decorative stone; it is not generally used as a structural building rock. Typical value is modest unless the pattern and polish are exceptional.

Geological facts

The exact trade name may be brecciated, scenic, or striped jasper, but the photograph alone cannot reliably determine a locality-specific variety.

Field identification & locations

Identify it by its opaque patterned body, glassy polish, high hardness, and resistance to scratching by steel; it should not show the translucency typical of agate. Common sources include India, Madagascar, Brazil, the United States, and Australia.