metamorphic
Jadeite (Jade)
Jadeite (NaAlSi2O6)
Hardness: 6.5–7.0 (Mohs scale); Color: Typically Apple-green, emerald-green, or lavender; Luster: Vitreous to greasy; Crystal Structure: Monoclinic; Cleavage: Good (rarely seen); Specific Gravity: 3.25–3.36.
- Hardness
- 6
- Color
- Typically Apple-green, emerald-green, or lavender
- Luster
- Vitreous to greasy
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Physical properties
Hardness: 6.5–7.0 (Mohs scale); Color: Typically Apple-green, emerald-green, or lavender; Luster: Vitreous to greasy; Crystal Structure: Monoclinic; Cleavage: Good (rarely seen); Specific Gravity: 3.25–3.36.
Formation & geological history
Formed in metamorphic rocks under high pressure and low temperature conditions, typically within subduction zones. Found in Burma, Guatemala, Japan, and California.
Uses & applications
Predominantly used for high-end jewelry (rings, pendants, bangles) and cultural carvings/artifacts. It is highly valued for its toughness and aesthetic bloom.
Geological facts
Jade has been used for over 5,000 years, originally for axe heads due to its extreme toughness before becoming a symbol of status and imperial power in China.
Field identification & locations
Identify in the field by its high density (feels heavy for its size), extreme toughness (difficult to break), and cold touch. It often has a unique 'mottled' texture under magnification.
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