sedimentary

Polished brecciated jasper with druzy quartz

Silicified breccia; primarily microcrystalline quartz/chalcedony (SiO₂), with iron oxides and possible drusy quartz

AI-generated identification · may be incorrect

Typically Mohs 6.5–7, opaque to translucent, mottled brown, gray, cream, and red, with waxy to glassy luster. Irregular breccia fragments, chalcedony, and small quartz-lined cavities are visible; no consistent cleavage, specific gravity about 2.6.

Identified August 18, 2026More sedimentary →

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At a glance

Common name: Polished brecciated jasper with druzy quartz
Scientific name: Silicified breccia; primarily microcrystalline quartz/chalcedony (SiO₂), with iron oxides and possible drusy quartz
Category: sedimentary
Identified: August 18, 2026
Method: Standard

AI Estimated Value

About $10–$40 for a hand-sized polished common specimen; $50–$150+ if the pattern, cavities, and polish are especially attractive.

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

Silica-rich fluids cemented and replaced fractured volcanic or sedimentary material, while later cavities developed quartz druzy; commonly Paleozoic to Cenozoic, depending on locality. The specimen is polished and may be cut from a geode-like jasper nodule.

Uses & applications

Used as a lapidary stone for cabochons, carvings, beads, spheres, and display specimens; rarely used in construction because it is ornamental rather than uniform.

Geological facts

The red and orange colors generally come from hematite or goethite, while gray-green areas may reflect chlorite or other alteration minerals. Sparkling cavity linings are drusy quartz.

Field identification & locations

Identify by its opaque multicolored breccia pattern, very fine quartz texture, hardness, and occasional crystal-lined vugs; common sources include Oregon, Utah, Idaho, Mexico, Brazil, and Madagascar. Acid does not fizz, unlike calcite-rich rocks.