
mineral
Sea Glass
Anthropogenic Silicate Glass
AI-generated identification · may be incorrectHardness of 5.5 to 7 on the Mohs scale, vibrant blue color, vitreous to frosted luster, amorphous crystal structure, conchoidal fracture.
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Physical properties
Hardness of 5.5 to 7 on the Mohs scale, vibrant blue color, vitreous to frosted luster, amorphous crystal structure, conchoidal fracture.
Formation & geological history
Formed from discarded human-made glass objects tumbled and weathered by wave action and sand abrasion in marine environments over decades.
Uses & applications
Used primarily in coastal jewelry, decorative mosaics, and by beachcombers and collectors.
Geological facts
Cobalt blue sea glass is relatively rare, often originating from old medicine bottles, poison bottles, or decorative glassware. The frosting effect is caused by millions of microscopic C-shaped pits from sand abrasion.
Field identification & locations
Found along saltwater shorelines and ocean beaches worldwide, highly prized by collectors for its frosted texture and deep coloration.