mineral

Likely polished quartz or glass-like mineral cabochon

Probably quartz (SiO₂), though the image cannot exclude man-made glass

AI-generated identification · may be incorrect

Rounded, highly polished, transparent-to-translucent gray-brown piece with reflective internal surfaces; quartz has Mohs hardness 7, vitreous luster, hexagonal crystal structure, and no cleavage. The strongly domed, uniform appearance may also indicate glass or a resin-mounted specimen.

Identified August 17, 2026More mineral →

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At a glance

Common name: Likely polished quartz or glass-like mineral cabochon
Scientific name: Probably quartz (SiO₂), though the image cannot exclude man-made glass
Category: mineral
Identified: August 17, 2026
Method: Standard

AI Estimated Value

About $1–$15 for a common polished quartz cabochon; potentially under $1 if glass, or $20–$100+ for unusually clear, attractive, or collectible quartz.

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

If quartz, it formed from silica-rich hydrothermal fluids or igneous processes, commonly during veins and pegmatites; its geological age depends on the host deposit. Polishing and shaping are human processing.

Uses & applications

Used as a cabochon, ornamental stone, jewelry component, or study specimen; quartz is also important in glass, electronics, and engineered materials.

Geological facts

The photograph alone is insufficient for confident mineral identification because the object is cut and polished and lacks visible crystal faces. A scratch test, specific gravity, and close inspection for bubbles would help distinguish quartz from glass.

Field identification & locations

Common quartz occurs worldwide, including Brazil, Madagascar, the United States, and many pegmatite regions. Quartz will not be scratched by a steel knife, whereas ordinary glass is typically softer; visible round bubbles strongly suggest glass.