metamorphic
Jadeite (Jade)
NaAlSi2O6 (Sodium Aluminum Silicate)
Hardness: 6.5–7.0 Mohs scale; Color: Intense emerald green (imperial), apple green, mottled; Luster: Vitreous to greasy; Crystal structure: Monoclinic (fibrous aggregates); Specific gravity: 3.25–3.35.
- Hardness
- 6
- Color
- Intense emerald green (imperial), apple green, mottled
- Luster
- Vitreous to greasy
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Physical properties
Hardness: 6.5–7.0 Mohs scale; Color: Intense emerald green (imperial), apple green, mottled; Luster: Vitreous to greasy; Crystal structure: Monoclinic (fibrous aggregates); Specific gravity: 3.25–3.35.
Formation & geological history
Formed in high-pressure, low-temperature metamorphic environments (subduction zones) where fluids interact with serpentinite; found primarily in Myanmar, Guatemala, and Russia.
Uses & applications
High-end jewelry (cabochons, bangles), ornamental carvings, statues, and historical artifacts; prized in Asian cultures for its beauty and spiritual significance.
Geological facts
Jadeite is one of two minerals called 'jade' (the other is nephrite). The most valuable variety is 'Imperial Jade,' which can be more expensive per carat than diamonds. It has been used for tools and ornaments for over 5,000 years.
Field identification & locations
Identify by its exceptional toughness (resistance to breakage), cool touch, and high-pitched 'clink' sound when tapped. For collectors, look for translucency and 'moss-in-snow' patterns. Found in alluvial deposits (river stones) or primary metamorphic veins.
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