sedimentary
Sea Glass
Man-made silicate glass (Amorphous silicon dioxide)
Hardness of 5.5 to 7 on the Mohs scale, translucent to opaque light green color, vitreous to frosted luster, amorphous crystal structure with conchoidal fracture, specific gravity around 2.4 to 2.8.
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Physical properties
Hardness of 5.5 to 7 on the Mohs scale, translucent to opaque light green color, vitreous to frosted luster, amorphous crystal structure with conchoidal fracture, specific gravity around 2.4 to 2.8.
Formation & geological history
Formed through the mechanical and chemical weathering of discarded human-made glass items in marine or freshwater environments over decades of tumbling by waves and sand.
Uses & applications
Commonly used in arts, crafts, jewelry making, and collected as a hobby by beachcombers.
Geological facts
Genuine sea glass can take anywhere from 20 to over 40 years of constant wave action to achieve its characteristic frosted, smooth texture.
Field identification & locations
Identified by its frosted appearance, smoothed edges, and lack of sharp corners, frequently found along ocean beaches and lake shores near populated areas.
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