metamorphic
Jadeite Jade
NaAlSi2O6 (Sodium Aluminum Silicate)
Hardness: 6.5–7.0 (Mohs scale); Color: Typically apple green to emerald green, but also white, lavender, yellow, and black; Luster: Vitreous to greasy; Crystal Structure: Monoclinic (fibrous aggregate); Cleavage: Perfect (rarely visible in gemstone form); Specific Gravity: 3.25–3.35
- Hardness
- 6
- Luster
- Vitreous to greasy
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Physical properties
Hardness: 6.5–7.0 (Mohs scale); Color: Typically apple green to emerald green, but also white, lavender, yellow, and black; Luster: Vitreous to greasy; Crystal Structure: Monoclinic (fibrous aggregate); Cleavage: Perfect (rarely visible in gemstone form); Specific Gravity: 3.25–3.35
Formation & geological history
Jadeite is formed in high-pressure, low-temperature metamorphic environments, typically within subduction zones. It is commonly found in serpentinite rocks and is geologically associated with ancient seafloor subduction.
Uses & applications
Primary use is in high-end jewelry (rings, bangles, necklaces) and fine ornamental carvings. In some cultures, it is used as a investment or heirloom due to its high durability and cultural significance.
Geological facts
Jadeite is one of two minerals known as jade, the other being Nephrite. For centuries, quality green jadeite (Imperial Jade) was reserved specifically for Chinese emperors. It is celebrated for its incredible toughness, which is even higher than diamond due to its interlocking fibrous structure.
Field identification & locations
In the field, it is often identified by its high density and cool-to-the-touch feel. It lacks the 'greasy' feel of Nephrite and is harder. It is primarily found in Myanmar (Burma), Guatemala, Japan, and Russia. Collectors value transparency, vibrant color, and lack of internal fractures.
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