mineral

Polished tiger’s-eye jasper (likely brecciated jasper)

Quartz-rich microcrystalline silica, chiefly SiO₂, with iron oxides and possible fibrous pseudomorphs

AI-generated identification · may be incorrect

Hardness about 6.5–7 Mohs; brown, ochre, reddish, and dark gray bands with a polished vitreous-to-waxy luster. It is cryptocrystalline, lacks visible cleavage, and has typical specific gravity near 2.6.

Identified August 21, 2026More mineral →

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At a glance

Common name: Polished tiger’s-eye jasper (likely brecciated jasper)
Scientific name: Quartz-rich microcrystalline silica, chiefly SiO₂, with iron oxides and possible fibrous pseudomorphs
Category: mineral
Identified: August 21, 2026
Method: Standard

AI Estimated Value

About $5–$30 for a palm-sized polished piece; roughly $30–$100 if it has strong chatoyancy, unusual patterning, or excellent workmanship.

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

Formed when silica-rich fluids replaced or cemented preexisting rock, with iron oxidation producing the warm colors; any chatoyant areas may reflect altered fibrous material. Precise age cannot be determined from the photograph.

Uses & applications

Used as a lapidary stone for cabochons, carvings, worry stones, and decorative objects; usually modestly valued unless pattern, chatoyancy, and polish are exceptional.

Geological facts

The specimen appears more jasper-like than classic golden tiger’s-eye because its pattern is mottled and opaque rather than strongly silky or chatoyant. The dark streaks may be iron-rich mineral seams.

Field identification & locations

Common sources include South Africa, Australia, India, Brazil, and the western United States. Field clues are opaque earthy colors, irregular banding, glassy/waxy polish, no fizz in dilute acid, and hardness sufficient to scratch ordinary glass.