gemstone

Faceted brown gemstone ring, likely smoky quartz

Smoky quartz (SiO₂), identification uncertain from the image

AI-generated identification · may be incorrect

The rectangular step-cut stone appears translucent brown with a vitreous luster; quartz has Mohs hardness 7 and a trigonal crystal structure, but the setting and photo prevent reliable confirmation. The metal setting is not geological material.

Identified September 26, 2026More gemstone →

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Physical properties

Formation & geological history

If smoky quartz, its color commonly develops through natural irradiation of aluminum-bearing quartz in granite pegmatites or hydrothermal veins; the crystal may be much older than the fashioned ring.

Uses & applications

Used in jewelry; value depends on the confirmed stone, size, clarity, workmanship, and metal hallmark.

Geological facts

Similar brown stones—including glass and other gems—can look alike in photographs; gemological testing is needed for identification.

Field identification & locations

A step-cut brown stone is consistent with smoky quartz, but color alone is not diagnostic. Check refractive index, inclusions, and metal marks; smoky quartz occurs worldwide, notably in Brazil, Madagascar, and the Alps.