Rock Identifier
Clear faceted quartz-like gemstone (Probably rock crystal quartz (SiO₂), though the image may show synthetic glass or cubic zirconia) — gemstone
gemstone

Clear faceted quartz-like gemstone

Probably rock crystal quartz (SiO₂), though the image may show synthetic glass or cubic zirconia

AI-generated identification · may be incorrect

Colorless and transparent with strong vitreous luster and many brilliant-cut facets; quartz has Mohs hardness 7, trigonal crystal structure, no prominent cleavage, and specific gravity about 2.65. The visible round brilliant cut is human-shaped, so natural crystal form cannot be assessed.

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Physical properties

Colorless and transparent with strong vitreous luster and many brilliant-cut facets; quartz has Mohs hardness 7, trigonal crystal structure, no prominent cleavage, and specific gravity about 2.65. The visible round brilliant cut is human-shaped, so natural crystal form cannot be assessed.

Formation & geological history

If quartz, it formed from silica-rich hydrothermal fluids or igneous pegmatites, commonly during Precambrian to younger geological events. A manufactured simulant is also plausible from the appearance alone.

Uses & applications

Used as a jewelry stone, ornamental cut gem, and collector piece; quartz is also important in glass, electronics, and abrasives. Faceted quartz typically has modest value unless exceptionally clear and well cut.

Geological facts

Quartz can resemble diamond but is softer and less brilliant; cubic zirconia and glass are common look-alikes. Faceting and flash photography make identification from this image unreliable.

Field identification & locations

Check with a loupe for bubbles (glass), facet-edge wear (quartz scratches more easily than CZ), and use refractive index or specific-gravity testing for confirmation. Common quartz sources include Brazil, Madagascar, the United States, and the Alps.