sedimentary

Sea Glass

Man-made silicate glass

AI-generated identification · may be incorrect

Hardness of 5.5 to 7 on the Mohs scale, frosted or weathered surface, rounded edges, vitreous to dull luster, amorphous crystal structure with no cleavage, specific gravity around 2.4 to 2.8.

Identified July 29, 2026More sedimentary →

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Physical properties

Hardness of 5.5 to 7 on the Mohs scale, frosted or weathered surface, rounded edges, vitreous to dull luster, amorphous crystal structure with no cleavage, specific gravity around 2.4 to 2.8.

Formation & geological history

Formed from discarded anthropogenic glass objects (bottles, jars, etc.) that have been broken, tumbled, and weathered by wave action, sand, and saltwater over decades in marine or freshwater environments.

Uses & applications

Commonly used in coastal home decor, jewelry making, mosaics, and crafts by collectors.

Geological facts

Genuine sea glass requires 20 to 40 years (sometimes over 100 years) of constant tumbling in natural bodies of water to achieve its characteristic frosted texture and smooth, rounded edges.

Field identification & locations

Found on beaches and shorelines worldwide, particularly near historical maritime trade routes, old coastal dumps, or populated coastal areas. Identify by its characteristic frosted, non-shiny surface and lack of sharp edges.