mineral

Blue sea glass or blue glassy mineral fragment

Uncertain; likely man-made soda-lime glass, not a natural mineral

AI-generated identification · may be incorrect

Opaque to translucent pale blue, smooth rounded edges, vitreous luster, and conchoidal fracture; glass has no crystal structure or Mohs hardness (typically about 5–6). The frosted surface and rounded form suggest abrasion, possibly sea glass.

Identified August 25, 2026More mineral →

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Physical properties

Formation & geological history

Most likely discarded blue glass naturally tumbled by waves or sediment; its exact age and source cannot be determined from the image. It may instead be a polished blue resin or slag fragment, requiring testing for confirmation.

Uses & applications

Usually a decorative or jewelry-making material rather than an industrial geological specimen; value is mainly aesthetic and depends on rarity, color, frosting, and provenance.

Geological facts

Natural sea glass commonly develops a matte, frosted patina over years to decades of weathering. Blue pieces are less common than green or clear glass, though this specimen appears unusually thick and smooth.

Field identification & locations

Inspect for bubbles, uniform color, and sharp conchoidal edges; a glass scratch test, density test, and UV response may help distinguish it from blue minerals such as chrysocolla or turquoise. Commonly found on beaches and in urban fill.