mineraloid / impactite
Libyan Desert Glass
Tektite (high-silica impact glass), SiO2 + tracing minerals
Hardness: 6.5-7 (Mohs). Color: Pale yellow, honey, or greenish-yellow. Luster: Vitreous/glassy. Structure: Amorphous. Specific Gravity: 2.21. Cleavage: None/Conchoidal fracture.
- Hardness
- 6
- Color
- Pale yellow, honey, or greenish-yellow
- Luster
- Vitreous/glassy
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Physical properties
Hardness: 6.5-7 (Mohs). Color: Pale yellow, honey, or greenish-yellow. Luster: Vitreous/glassy. Structure: Amorphous. Specific Gravity: 2.21. Cleavage: None/Conchoidal fracture.
Formation & geological history
Formed approximately 29 million years ago during the Cenozoic era. It was created by the intense heat and pressure of a meteorite impact or airburst in the Great Sand Sea of the Sahara, melting desert sand into glass.
Uses & applications
Mostly used for jewelry (faceted or wire-wrapped), metaphysical collecting, and scientific research.
Geological facts
A piece of Libyan Desert Glass was found as the center scarab in King Tutankhamun's pectorals, proving it was highly valued in ancient Egypt. It contains 98% silica, making it one of the purest natural glasses.
Field identification & locations
Identify by its unique 'frosted' wind-abraded surface and bubbles/lechatelierite inclusions. Found exclusively in the border region between Libya and Egypt. Collectors look for clarity and wind-sculpted shapes.
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Libyan Desert Glass
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