
gemstone
Colorless faceted quartz-like gemstone
Likely quartz (SiO₂), though the appearance may also indicate man-made glass or cubic zirconia
AI-generated identification · may be incorrectColorless, transparent, vitreous luster, faceted/cut surface, and no visible natural crystal faces. Quartz has Mohs hardness 7 and specific gravity 2.65; cubic zirconia is harder (8–8.5) and denser (about 5.6–6.0).
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Physical properties
Colorless, transparent, vitreous luster, faceted/cut surface, and no visible natural crystal faces. Quartz has Mohs hardness 7 and specific gravity 2.65; cubic zirconia is harder (8–8.5) and denser (about 5.6–6.0).
Formation & geological history
If quartz, it formed in hydrothermal veins or igneous cavities over geologic time and was later cut; natural quartz is common in many ages and regions. The regular brilliant cut makes a manufactured simulant plausible, but the image alone cannot confirm this.
Uses & applications
Cut quartz is used in inexpensive jewelry and ornaments; cubic zirconia and glass are common diamond simulants. Value depends strongly on confirmed identity, clarity, cut, and weight.
Geological facts
Strong flash and apparent internal reflections are consistent with faceted quartz or a simulant, not enough to establish diamond. A loupe, refractometer, and hardness or thermal-conductivity testing are needed for identification.
Field identification & locations
Check for bubbles or swirl marks (glass), doubled facet edges (often quartz), high density (cubic zirconia), and inclusions. Common quartz sources include Brazil, Madagascar, and the United States.
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