gemstone

Faceted brown gemstone ring, likely smoky quartz

Quartz (SiO₂); identification from the image is uncertain

AI-generated identification · may be incorrect

The rectangular step-cut stone is transparent to translucent brown with a vitreous luster; quartz has Mohs hardness 7 and a hexagonal crystal structure. The setting appears to be silver-colored metal; the image does not establish the stone’s identity or whether it is natural or treated.

Identified September 27, 2026More gemstone →

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Physical properties

Formation & geological history

If smoky quartz, its color comes from natural irradiation of trace aluminum in quartz, commonly in granitic pegmatites and hydrothermal veins. Quartz deposits occur worldwide and range from ancient to geologically recent.

Uses & applications

Faceted quartz is used in jewelry and decorative objects; quartz also has extensive industrial uses in glassmaking and electronics.

Geological facts

Brown faceted stones can also be citrine, garnet, or glass, so color alone is not diagnostic.

Field identification & locations

Check with a jeweler or gemologist; refractive-index testing and magnification can distinguish quartz from lookalikes. A photograph cannot confirm composition, treatment, or origin.