mineral

Polished orbicular jasper (likely ocean jasper or similar orbicular jasper)

Silica-rich microcrystalline quartz/chalcedony, chiefly SiO₂; exact variety cannot be confirmed from the image

AI-generated identification · may be incorrect

Opaque, polished reddish-brown stone with rounded cream, blue-gray, and pale orbicular spots. Quartz hardness is about 6.5–7 Mohs; vitreous to waxy luster, cryptocrystalline structure, and no obvious cleavage.

Identified October 11, 2026More mineral →

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At a glance

Common name: Polished orbicular jasper (likely ocean jasper or similar orbicular jasper)
Scientific name: Silica-rich microcrystalline quartz/chalcedony, chiefly SiO₂; exact variety cannot be confirmed from the image
Category: mineral
Identified: October 11, 2026
Method: Standard

AI Estimated Value

About $5–$30 USD for a small polished stone; size, pattern, and confirmed provenance affect value.

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 volcanic fluids and alteration produced the orbicular patterns, later silicified; geological age and locality cannot be determined visually. The specimen may be cut and polished from material mined in Madagascar or another jasper deposit.

Uses & applications

Used for lapidary pieces, jewelry, and collecting; not typically used as a major construction stone.

Geological facts

“Orbicular jasper” describes the spot-like patterns, rather than one uniquely defined mineral species.

Field identification & locations

Look for distinct rounded contrasting spots within a hard, opaque, silica-rich stone; jasper commonly occurs in altered volcanic rocks and sedimentary silica deposits. A photo cannot establish its exact variety or provenance.