Rock Identifier
Colorless faceted gemstone, likely glass or quartz (Uncertain; possibly quartz (SiO₂), but the strong uniform brilliance and apparent molded/faceted form may indicate leaded glass or cubic zirconia) — gemstone
gemstone

Colorless faceted gemstone, likely glass or quartz

Uncertain; possibly quartz (SiO₂), but the strong uniform brilliance and apparent molded/faceted form may indicate leaded glass or cubic zirconia

AI-generated identification · may be incorrect

Colorless, transparent, vitreous-to adamantine luster with numerous triangular and brilliant-cut facets. Hardness cannot be determined from the image: quartz is Mohs 7, cubic zirconia about 8–8.5, and glass about 5–6.

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Physical properties

Colorless, transparent, vitreous-to adamantine luster with numerous triangular and brilliant-cut facets. Hardness cannot be determined from the image: quartz is Mohs 7, cubic zirconia about 8–8.5, and glass about 5–6.

Formation & geological history

If quartz, it formed from silica-rich hydrothermal or igneous fluids over geologic time; if cubic zirconia or glass, it is synthetic and human-made. The photograph does not show diagnostic inclusions, cleavage, or crystal form.

Uses & applications

Used as jewelry or a decorative stone; quartz may also be used industrially, while cubic zirconia and glass are inexpensive diamond simulants.

Geological facts

The intense central flash is caused by brilliant faceting and reflected camera light, not necessarily exceptional clarity or value. Facet geometry and optical tests are needed for identification.

Field identification & locations

Check with a loupe for bubbles (glass), curved growth lines (glass), inclusions, and facet wear; test refractive index, specific gravity, and hardness professionally. It may be a cut quartz, cubic zirconia, or glass imitation.