metamorphic
Jadeite Jade
NaAlSi2O6 (Sodium Aluminum Silicate)
Hardness: 6.5–7.0 Mohs; Color: Pale green to apple green with darker veins/splotches; Luster: Vitreous to greasy; Crystal structure: Monoclinic; Cleavage: Prismatic in two directions at 87° and 93° (rarely seen in polished form); Specific gravity: 3.24–3.43
- Hardness
- 6
- Color
- Pale green to apple green with darker veins/splotches
- Luster
- Vitreous to greasy
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Physical properties
Hardness: 6.5–7.0 Mohs; Color: Pale green to apple green with darker veins/splotches; Luster: Vitreous to greasy; Crystal structure: Monoclinic; Cleavage: Prismatic in two directions at 87° and 93° (rarely seen in polished form); Specific gravity: 3.24–3.43
Formation & geological history
Formed in high-pressure, low-temperature metamorphic environments, typically in subduction zones within serpentinites. Geological ages range widely from Mesozoic to Cenozoic depending on the deposit site.
Uses & applications
Extensively used in fine jewelry (cabochons, beads, bangles), ornamental carvings, and traditional artifacts. Highly valued in East Asian cultures for its beauty and symbolic durability.
Geological facts
Jadeite is one of two distinct minerals referred to as 'jade,' the other being nephrite. It is significantly tougher than its hardness suggests due to an interlocking granular structure, making it resistant to fracturing.
Field identification & locations
Identify in the field by its high density (feels heavy for its size) and its characteristic 'orange peel' surface texture when polished. Found in Myanmar (highest quality), Guatemala, Japan, and parts of Russia/California.
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