gemstone

Polished carnelian jasper / brecciated jasper

Microcrystalline quartz (SiO₂), chalcedony with iron-oxide pigments and opaque jasper fragments

AI-generated identification · may be incorrect

Typically Mohs hardness 6.5–7, waxy to vitreous luster, reddish-brown/orange with black or yellow patches, and no visible cleavage; the glossy surface appears polished or naturally water-worn. The pattern suggests brecciation and iron staining rather than a single crystal mineral.

Identified August 10, 2026More gemstone →

Explore Polished carnelian jasper / brecciated jasper in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

At a glance

Common name: Polished carnelian jasper / brecciated jasper
Scientific name: Microcrystalline quartz (SiO₂), chalcedony with iron-oxide pigments and opaque jasper fragments
Category: gemstone
Identified: August 10, 2026
Method: Standard

AI Estimated Value

About $5–$25 for a small polished specimen; $30–$100+ for larger, unusually patterned or locally documented 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 fluids cement fractured volcanic or sedimentary material, with iron oxides producing the red-brown colors; formation ages vary widely, commonly Paleozoic to Cenozoic. The specimen may be tumbled or naturally river-polished.

Uses & applications

Used for cabochons, beads, carvings, ornamental stone, and inexpensive lapidary pieces; rarely used as aggregate or dimension stone.

Geological facts

Jasper is an opaque variety of chalcedony, while carnelian is translucent orange-red chalcedony; mixed specimens are often marketed broadly as jasper or carnelian jasper.

Field identification & locations

Identify by testing for hardness near quartz, opaque-to-translucent silica, conchoidal fracture, and red iron-rich coloration; common sources include India, Madagascar, Brazil, Uruguay, and the western United States.