metamorphic
Jadeite Jade
NaAlSi2O6 (Sodium Aluminum Silicate)
Hardness: 6.5–7.0 (Mohs scale); Color: Mottled green, translucent to opaque; Luster: Vitreous to greasy; Crystal Structure: Monoclinic; Cleavage: Prismatic in two directions; Specific Gravity: 3.25–3.43.
- Hardness
- 6
- Color
- Mottled green, translucent to opaque
- Luster
- Vitreous to greasy
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Physical properties
Hardness: 6.5–7.0 (Mohs scale); Color: Mottled green, translucent to opaque; Luster: Vitreous to greasy; Crystal Structure: Monoclinic; Cleavage: Prismatic in two directions; Specific Gravity: 3.25–3.43.
Formation & geological history
Forms in high-pressure, low-temperature environments within subduction zones. It often occurs as large boulders or in serpentinite deposits. Geological age varies by deposit location, commonly found in Mesozoic or Cenozoic metamorphic belts.
Uses & applications
Primarily used in jewelry (pendants, bangles), ornamental carvings, and historical artifacts. In ancient times, it was used for axe heads due to its extreme toughness.
Geological facts
Jadeite is one of two minerals known as 'Jade' (the other being Nephrite). The specimen in the image is carved into a 'Matau' (fishhook) shape, a traditional Māori symbol from New Zealand representing strength and safe travel over water.
Field identification & locations
Identify in the field by its high density and coolness to the touch. It is much harder than serpentine or soapstone. Found in Myanmar (highest quality), Guatemala, Russia, and California.
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