mineral

Polished brecciated jasper

Jasper, an opaque microcrystalline variety of quartz (SiO₂), with iron-oxide coloration and possible breccia fragments

AI-generated identification · may be incorrect

Typically hardness 6.5–7, opaque, brown-red to orange with dark gray inclusions, and a vitreous to waxy luster after polishing. It has cryptocrystalline quartz structure, no visible cleavage, and specific gravity around 2.5–2.7.

Identified August 30, 2026More mineral →

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At a glance

Common name: Polished brecciated jasper
Scientific name: Jasper, an opaque microcrystalline variety of quartz (SiO₂), with iron-oxide coloration and possible breccia fragments
Category: mineral
Identified: August 30, 2026
Method: Standard

AI Estimated Value

Approximately $5–$25 for a typical polished palm stone; $30–$100+ for larger, unusually patterned, or locality-specific 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 replace or cement fine-grained sediments, volcanic material, or fractured rock; iron oxides produce the red-brown colors. Jasper deposits range from Precambrian to recent, depending on locality.

Uses & applications

Commonly cut into cabochons, beads, worry stones, carvings, and ornamental objects; occasionally used as decorative facing stone. Its value is primarily lapidary and aesthetic rather than industrial.

Geological facts

The mottled texture and iron-rich red-orange zones are characteristic of jasper, while the irregular darker patches may represent brecciation or volcanic inclusions. Jasper is not a single mineral species but a rock dominated by microcrystalline quartz.

Field identification & locations

Identify it by its opaque appearance, fine grain, lack of cleavage, high polish, and resistance to scratching by steel; it should not show translucent quartz-like edges. Common sources include India, Madagascar, Brazil, Australia, Mexico, and the United States.