Rock Identifier
Colorless faceted gemstone, likely glass or quartz (Uncertain; appearance is consistent with faceted quartz (SiO₂), but cut glass or cubic zirconia cannot be excluded from the photograph) — gemstone
gemstone

Colorless faceted gemstone, likely glass or quartz

Uncertain; appearance is consistent with faceted quartz (SiO₂), but cut glass or cubic zirconia cannot be excluded from the photograph

AI-generated identification · may be incorrect

Colorless, transparent, strongly brilliant, and round-faceted with a starburst-style cut. Quartz has Mohs hardness 7, vitreous luster, hexagonal crystal structure, no cleavage, and specific gravity about 2.65; glass is softer and cubic zirconia is denser (about 5.6–6.0).

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Physical properties

Colorless, transparent, strongly brilliant, and round-faceted with a starburst-style cut. Quartz has Mohs hardness 7, vitreous luster, hexagonal crystal structure, no cleavage, and specific gravity about 2.65; glass is softer and cubic zirconia is denser (about 5.6–6.0).

Formation & geological history

If quartz, it formed in silica-rich hydrothermal veins or pegmatites over geological time and was later cut and polished. The visible object may instead be a manufactured imitation, which has no natural geological formation history.

Uses & applications

Quartz gemstones are used in jewelry and ornament; cubic zirconia and glass are common inexpensive diamond simulants. Unmounted material has little industrial or construction use.

Geological facts

The intense flash is caused by many polished facets and direct illumination, not necessarily high gemstone quality. Identification requires hardness, refractive-index, specific-gravity, and loupe testing.

Field identification & locations

Check for facet-edge wear, bubbles or flow lines (glass), doubling through facets (often quartz), and compare weight; do not scratch valuable material without testing. Common quartz sources include Brazil, Madagascar, and the United States.