igneous
Tektite (Indochinite)
Impactite / Tektite (Silica-rich glass)
Hardness: 5.5-6.5 on Mohs scale; Color: Black, dark brown to translucent dark olive green; Luster: Vitreous to sub-glassy; Structure: Amorphous (non-crystalline glass); Specific Gravity: 2.3–2.5.
- Hardness
- 5
- Color
- Black, dark brown to translucent dark olive green
- Luster
- Vitreous to sub-glassy
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Physical properties
Hardness: 5.5-6.5 on Mohs scale; Color: Black, dark brown to translucent dark olive green; Luster: Vitreous to sub-glassy; Structure: Amorphous (non-crystalline glass); Specific Gravity: 2.3–2.5.
Formation & geological history
Tektites are formed from terrestrial debris ejected during a meteorite impact. These high-speed ejecta melt upon impact and solidify into glass as they fall back through the atmosphere. Indochinites are associated with an impact roughly 790,000 years ago.
Uses & applications
Primarily for collector markets, metaphysical jewelry, and scientific study regarding impact events and aerodynamical ablation.
Geological facts
The Indochinite strewn field is the largest on Earth, covering much of Southeast Asia and Australia. They are often pitted with 'cupules' caused by air ablation during their supersonic flight through the atmosphere.
Field identification & locations
Identify by its characteristic pitted, bubbly surface, black color that shows a brownish-yellow transmission when held to light, and glassy interior. Common in Thailand, Vietnam, and Cambodia.
