gemstone

Polished jasper carving or slab

Jasper, an opaque microcrystalline variety of quartz (SiO₂), likely iron-oxide-rich brecciated or orbicular jasper

AI-generated identification · may be incorrect

Typically Mohs hardness 6.5–7, opaque, brown to reddish with black or cream patterning, and a waxy to vitreous luster after polishing; quartz crystals are microscopic and show no visible cleavage. The image shows a thin, polished, pointed geological piece, though exact variety cannot be confirmed from the photograph.

Identified August 28, 2026More gemstone →

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At a glance

Common name: Polished jasper carving or slab
Scientific name: Jasper, an opaque microcrystalline variety of quartz (SiO₂), likely iron-oxide-rich brecciated or orbicular jasper
Category: gemstone
Identified: August 28, 2026
Method: Standard

AI Estimated Value

Approximately $5–$30 for a small polished piece; $30–$100+ if unusually patterned, expertly carved, or from a sought-after locality.

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 replaces or fills cavities and fractures in volcanic or sedimentary rocks, with iron and other impurities creating its colors and patterns. Deposits occur in many ages and regions worldwide.

Uses & applications

Used for cabochons, carvings, ornamental slabs, bookends, and lapidary collectibles; usually modest commercial value.

Geological facts

Jasper is technically a rock rather than a single mineral and is commonly grouped with chalcedony and agate. Its patterns are produced by brecciation, fluid movement, and mineral impurities.

Field identification & locations

Identify by its opaque appearance, fine texture, hardness, and inability to scratch with a steel knife; it should not fizz in dilute acid. Common sources include Madagascar, Brazil, India, Australia, and the western United States.