metamorphic
Jadeite
NaAlSi2O6 (Sodium Aluminum Silicate)
Hardness: 6.5 to 7.0 Mohs; Color: Apple green to emerald green, may also be white, lavender, or yellow; Luster: Vitreous to greasy; Crystal Structure: Monoclinic (fibrous/granular); Specific Gravity: 3.24 to 3.43.
- Hardness
- 6
- Luster
- Vitreous to greasy
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Physical properties
Hardness: 6.5 to 7.0 Mohs; Color: Apple green to emerald green, may also be white, lavender, or yellow; Luster: Vitreous to greasy; Crystal Structure: Monoclinic (fibrous/granular); Specific Gravity: 3.24 to 3.43.
Formation & geological history
Formed in high-pressure, low-temperature metamorphic environments such as subduction zones. Most significant deposits are from the Mesozoic or Cenozoic eras.
Uses & applications
Used extensively in jewelry, ornamental carvings, and historical artifacts. Highly valued in Asian cultures as a symbol of protection and status.
Geological facts
Jadeite is one of two minerals referred to as 'Jade' (the other being Nephrite). It is tougher than steel due to its interlocking fibrous structure, making it difficult to fracture.
Field identification & locations
Identify by its exceptional toughness, smooth waxy surface when polished, and high density. Commonly found in Myanmar (Burma), Guatemala, Japan, and California.
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