igneous
Tektite (Indochinite)
Tektite (Amorphous Silica Glass)
Hardness: 5.5-6.5; Color: Black, dark brown (greenish when thin); Luster: Vitreous to dull; Structure: Amorphous (glassy); Cleavage: Conchoidal fracture; Specific gravity: 2.3-2.5
- Hardness
- 5
- Color
- Black, dark brown (greenish when thin)
- Luster
- Vitreous to dull
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Physical properties
Hardness: 5.5-6.5; Color: Black, dark brown (greenish when thin); Luster: Vitreous to dull; Structure: Amorphous (glassy); Cleavage: Conchoidal fracture; Specific gravity: 2.3-2.5
Formation & geological history
Formed from terrestrial debris ejected into the atmosphere during a high-energy meteorite impact, then rapidly cooled into glass as it fell back to Earth. Indochinites are associated with the Australasian strewn field, approximately 780,000 years old.
Uses & applications
Primarily used for gemstone jewelry, decorative collectibles, and in metaphysical practices. They are valued by researchers for studying celestial impact events.
Geological facts
Tektites are distinct from meteorites because they are made of terrestrial material that was melted and flung into space before re-entering. Indochinites are the most common variety found on Earth.
Field identification & locations
Identify by its pitted, scalloped surface (cupules) and smooth conchoidal fractures. Commonly found in Southeast Asia, Thailand, and Vietnam. Collectors should look for signs of aerodynamic shaping such as aerodynamic teardrop or disk shapes.
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