mineral

Green sea glass (likely bottle glass)

Human-processed soda–lime silicate glass; not a natural mineral or rock

AI-generated identification · may be incorrect

Opaque to translucent green, frosted matte surface, vitreous interior, and conchoidal fracture; Mohs hardness about 5–6. It has no crystal structure or cleavage and is less dense than most common rocks (about 2.4–2.6).

Identified August 29, 2026More mineral →

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Physical properties

Formation & geological history

Formed by anthropogenic glass manufacture, probably from a discarded green bottle, then naturally tumbled and chemically frosted by waves or abrasion over years to decades; it has no geological age.

Uses & applications

Collected as beach glass and used in jewelry, mosaics, crafts, and decorative art; value is mainly aesthetic and depends on color, frosting, shape, and provenance.

Geological facts

The rich green color commonly comes from iron, with chromium sometimes producing deeper emerald tones. Genuine sea glass typically has uniformly frosted surfaces and smoothly rounded edges rather than sharp manufactured facets.

Field identification & locations

Identify it by its bottle-green color, rounded irregular shape, bubbles or flow lines, and sugary frosting; natural green minerals usually show crystalline grains or cleavage. Common near historic shorelines, harbors, and former glass-disposal sites.