gemstone

Clear faceted gemstone, likely quartz (rock crystal)

Quartz, silicon dioxide (SiO₂); visual identification is uncertain because the stone is heavily faceted and photographed with flash

AI-generated identification · may be incorrect

Identified September 16, 2026More gemstone →

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At a glance

Common name: Clear faceted gemstone, likely quartz (rock crystal)
Scientific name: Quartz, silicon dioxide (SiO₂); visual identification is uncertain because the stone is heavily faceted and photographed with flash
Category: gemstone
Identified: September 16, 2026
Method: Standard

AI Estimated Value

About $5–$30 if ordinary faceted quartz or glass; $20–$150 for attractive natural quartz, depending on size, clarity, and cut.

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

Colorless and transparent with vitreous luster and numerous brilliant-cut facets; quartz has Mohs hardness 7, hexagonal crystal structure, no true cleavage, conchoidal fracture, and specific gravity about 2.65. It could alternatively be glass or synthetic cubic zirconia, which cannot be reliably distinguished from this image.

Formation & geological history

Natural quartz forms in hydrothermal veins and igneous cavities, commonly from Paleozoic to younger geological settings; faceting is human processing. A gemstone identity requires hardness, refractive-index, and inclusion testing.

Uses & applications

Faceted quartz is used in inexpensive jewelry and ornaments; gem-quality quartz is collectible but generally modestly priced. If synthetic cubic zirconia, it is a diamond simulant rather than a natural mineral specimen.

Geological facts

Quartz commonly shows internal veils, fractures, or mineral inclusions; cubic zirconia is typically exceptionally bright and heavier. A loupe and polariscope can help, while a gem refractometer provides a strong separation.

Field identification & locations

Common sources include Brazil, Madagascar, the United States, and worldwide hydrothermal deposits. Test cautiously with a professional: glass scratches around Mohs 5–5.5, quartz scratches glass, and cubic zirconia has SG near 5.6.