tektite
Moldavite
Moldavite (Silica-rich glass, SiO2 + Al2O3)
Hardness: 5.5-7 (Mohs); Color: Forest green, olive green, or pale green; Luster: Vitreous; Crystal Structure: Amorphous (glassy); Specific Gravity: 2.27-2.40
- Hardness
- 5
- Color
- Forest green, olive green, or pale green
- Luster
- Vitreous
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Physical properties
Hardness: 5.5-7 (Mohs); Color: Forest green, olive green, or pale green; Luster: Vitreous; Crystal Structure: Amorphous (glassy); Specific Gravity: 2.27-2.40
Formation & geological history
Formed approximately 15 million years ago by the impact of a meteorite in southern Germany (Ries crater), which melted terrestrial rock and ejected it into the atmosphere, where it cooled and fell back over the Czech Republic.
Uses & applications
Primarily used in jewelry, as cabochons or faceted stones, and as a highly sought-after specimen for mineral and gemstone collectors.
Geological facts
Moldavite is an extraterrestrial-related material known as a tektite. It is unique among tektites for its vibrant green color and transparency. It was once used in the Stone Age for making tools and amulets.
Field identification & locations
Identify by its characteristic 'lechatelierite' (melted quartz) inclusions and bubbles under magnification. Authentic pieces often have a wrinkled or sculpted surface. Commonly found in the Czech Republic, specifically the Bohemian plateau.
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