metamorphic
Jadeite Jade
Jadeite (NaAlSi2O6)
Hardness: 6.5–7.0 (Mohs scale); Color: Emerald green (Imperial Jade), apple green, or white; Luster: Vitreous to greasy; Crystal Structure: Monoclinic (fibrous/granular aggregate); Cleavage: None visible in polished form; Specific Gravity: 3.24–3.43.
- Hardness
- 6
- Color
- Emerald green (Imperial Jade), apple green, or white
- Luster
- Vitreous to greasy
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Physical properties
Hardness: 6.5–7.0 (Mohs scale); Color: Emerald green (Imperial Jade), apple green, or white; Luster: Vitreous to greasy; Crystal Structure: Monoclinic (fibrous/granular aggregate); Cleavage: None visible in polished form; Specific Gravity: 3.24–3.43.
Formation & geological history
Formed in high-pressure, low-temperature metamorphic environments such as subduction zones. Most high-quality specimens are found in metamorphic rocks like serpentinite. Common geological ages vary but are typically associated with plate tectonic movements.
Uses & applications
Primarily used as a gemstone in jewelry (rings, pendants), decorative carvings, and cultural artifacts. Known for its extreme toughness, it was historically used for axe heads and tools.
Geological facts
Jadeite is one of two distinct minerals known as 'Jade' (the other being Nephrite). Jadeite is rarer and more valuable. It has been venerated in Chinese and Mesoamerican cultures for thousands of years as a symbol of status and immortality.
Field identification & locations
Identify in the field by its distinct waxy to oily luster and extreme toughness. Unlike many green stones, it is difficult to scratch. Common locations include Myanmar (the primary source of fine jade), Guatemala, Japan, and California, USA.
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