mineral

Polished jasper or chert carving (tentative)

Microcrystalline quartz, SiO₂, likely jasper/chert; exact identification is uncertain from the image

AI-generated identification · may be incorrect

Opaque ochre-brown material with a smooth, polished surface and pale curved vein or band. Quartz hardness is about 6.5–7 Mohs, vitreous to waxy luster, cryptocrystalline structure, and no visible cleavage; density is roughly 2.6 g/cm³.

Identified August 26, 2026More mineral →

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At a glance

Common name: Polished jasper or chert carving (tentative)
Scientific name: Microcrystalline quartz, SiO₂, likely jasper/chert; exact identification is uncertain from the image
Category: mineral
Identified: August 26, 2026
Method: Standard

AI Estimated Value

About $5–$30 for a small common polished specimen; $30–$150 or more if it is an identifiable, high-quality carving or rare patterned jasper.

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

Jasper and chert form when silica-rich fluids replace or cement sediments, commonly during diagenesis or volcanic alteration. Their ages range from Precambrian to recent, depending on the host formation.

Uses & applications

Used for cabochons, carvings, beads, decorative objects, and lapidary specimens; rarely used as aggregate or building stone.

Geological facts

The pale line may be a quartz vein, healed fracture, or contrasting silica-rich band. The shape appears human-polished or carved rather than naturally weathered.

Field identification & locations

Common sources include the western United States, Madagascar, Brazil, India, Australia, and Mexico. Confirm with a hardness test, streak test, magnification, and specific-gravity measurement; avoid testing a valuable polished piece.