Libyan Desert Glass
Libyan Desert Glass (Impact Glass/Tektite) · Meteoritic Material
Crystal System
Amorphous (Non-crystalline); found in irregular, wind-sculpted (ventifact) or aerodynamic shapes
Mineral Group
Tektites / Natural Glass
Chemical Formula
SiO2 (approx. 98% Silica) with trace amounts of iron, aluminum, and titanium
Formation Process
Impact-related (Meteoritic); formed approximately 29 million years ago when a meteorite impact (or high-altitude airburst) flash-melted desert sand into molten glass that cooled rapidly.
About This Crystal
Translucent to transparent pale yellow or greenish-yellow glass. Features a waxy to vitreous luster, often containing tiny bubbles (vesicles), white lechatelierite (high-temperature silica glass), and occasionally dark streaks of meteoric material.
Physical Characteristics
Color: Pale yellow, straw, or champagne. Streak: White. Cleavage: None. Fracture: Conchoidal (shell-like). Specific Gravity: 2.2. Tenacity: Brittle. Fluorescence: Typically inert or weak green/yellow under UV.
Optical Properties
Refractive Index: 1.46 (Singly refractive). Birefringence: None. Luster: Vitreous to waxy. Transparency: Translucent to Transparent.
Hardness & Durability
Origin Region
Great Sand Sea of the Eastern Sahara, specifically the Libyan Desert along the border of Egypt and Libya
Hardness & Durability
Mohs Hardness: 5 to 6. Toughness: Poor (brittle like glass). Stability: Generally stable but sensitive to thermal shock and hard impacts.
Care & Maintenance
Clean with warm soapy water and a soft cloth; avoid ultrasonic or steam cleaners. Store separately from harder gemstones like quartz or topaz to prevent scratching.
Rarity & Value
Rare (Limited geographic source); value is determined by transparency, shape (ventifacts), and size. Prices range from $2 to $15 per gram for average specimens, higher for large museum-grade pieces.
Special Characteristics
Natural glass ventifacts; may contain lechatelierite inclusions and rare traces of extraterrestrial iridium or cosmic dust within dark streaks.
Lore & History
Historically used in ancient Egypt; a scarab carved from Libyan Desert Glass was found in the center of Tutankhamun's pectoral jewelry. Metaphysically associated with the Solar Plexus chakra, transformation, and cosmic connection.