gemstone

Tumbled blue-green stone, likely aquamarine

Possibly beryl, Be₃Al₂Si₆O₁₈; identification from the image is uncertain

AI-generated identification · may be incorrect

Pale blue-green, translucent, with a polished surface and glassy luster. Beryl has Mohs hardness 7.5–8 and a hexagonal crystal structure; this rounded piece does not show diagnostic crystal faces or cleavage.

Identified October 8, 2026More gemstone →

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Physical properties

Formation & geological history

If aquamarine, it formed in beryllium-bearing granitic pegmatites as magma cooled, commonly during the Precambrian or later. Tumbling has rounded and polished the specimen.

Uses & applications

Tumbled stones are used for jewelry, decoration, and collecting; gem-quality aquamarine is faceted for jewelry.

Geological facts

Aquamarine is the blue to blue-green variety of beryl; color alone cannot confirm this specimen’s identity.

Field identification & locations

Common aquamarine sources include Brazil, Madagascar, and Pakistan. Confirm with gemological tests, since similar pale stones may be quartz, glass, or other minerals.