metamorphic
Jadeite Jade
NaAlSi2O6 (Sodium Aluminum Silicate)
Hardness: 6.5-7 Mohs; Color: Pale green to white; Luster: Vitreous to greasy; Structure: Monoclinic, interlocking microcrystalline fibrous; Specific Gravity: 3.25-3.36.
- Hardness
- 6
- Color
- Pale green to white
- Luster
- Vitreous to greasy
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Physical properties
Hardness: 6.5-7 Mohs; Color: Pale green to white; Luster: Vitreous to greasy; Structure: Monoclinic, interlocking microcrystalline fibrous; Specific Gravity: 3.25-3.36.
Formation & geological history
Formed in high-pressure, low-temperature metamorphic environments, typically in subduction zones where oceanic plates meet continental plates. Primary sources are Myanmar, Guatemala, and Japan.
Uses & applications
Primarily used in jewelry for beads, cabochons, and carvings. Historically used for ceremonial tools and status symbols in Mesoamerican and Chinese cultures.
Geological facts
Jadeite is one of two minerals known as Jade (the other being Nephrite). The color in green jadeite is usually due to chromium. High-quality 'Imperial Jade' is the most valuable variety.
Field identification & locations
Identify by its exceptional toughness (resistance to fracture) and cool temperature to the touch. In the field, look for a greasy surface luster and a translucent appearance in thin pieces.
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