Rock Identifier
Possible tektite (natural impact glass) (Tektite; natural silica-rich impact glass, composition varies by strewn field) — meteorite
meteorite

Possible tektite (natural impact glass)

Tektite; natural silica-rich impact glass, composition varies by strewn field

AI-generated identification · may be incorrect

Dark brown to black, glossy, irregular and somewhat sculpted surface; typically amorphous with no cleavage, Mohs hardness about 5–6 and specific gravity around 2.3–2.6. The photograph alone cannot confirm that this is a tektite rather than another dark glassy material.

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Physical properties

Dark brown to black, glossy, irregular and somewhat sculpted surface; typically amorphous with no cleavage, Mohs hardness about 5–6 and specific gravity around 2.3–2.6. The photograph alone cannot confirm that this is a tektite rather than another dark glassy material.

Formation & geological history

Tektites formed when an asteroid impact melted terrestrial rock and ejected droplets that cooled rapidly, generally millions of years ago. Their age and source depend on the impact strewn field; the specimen’s origin cannot be determined from the image.

Uses & applications

Primarily collected as a geological curiosity; verified pieces may be cut or polished for jewelry. Not generally used in construction or industry.

Geological facts

Tektites are impact glass, not meteorites: most of their material comes from the target rocks on Earth. Common types include moldavite, australites, and indochinites.

Field identification & locations

Check for a natural etched or sculpted surface, glassy luster, and lack of bubbles or uniform manufactured edges; identification needs examination and provenance. Tektites occur in impact strewn fields such as Southeast Asia and Central Europe.