metamorphic
Green Jade (specifically Nephrite)
Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)
Hardness: 6.0 to 6.5 Mohs scale. Color: Rich forest green, often with dark flecks. Luster: Vitreous to greasy. Crystal structure: Monoclinic, typically found in interlocking needle-like fibrous masses. Cleavage: Indistinct. Specific gravity: 2.90 to 3.03.
- Hardness
- 6
- Color
- Rich forest green, often with dark flecks
- Luster
- Vitreous to greasy
Identified More metamorphic →
Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 6.0 to 6.5 Mohs scale. Color: Rich forest green, often with dark flecks. Luster: Vitreous to greasy. Crystal structure: Monoclinic, typically found in interlocking needle-like fibrous masses. Cleavage: Indistinct. Specific gravity: 2.90 to 3.03.
Formation & geological history
Formed through the regional metamorphism of magnesium-rich rocks (like serpentinite or dolomitic limestone) under high pressure and relatively low temperatures. Most deposits date from the Precambrian to the Mesozoic eras.
Uses & applications
Used primarily in jewelry (cabochons, rings), ornamental carvings, and historical ritual objects. Due to its extreme toughness, it was historically used for axe heads and weapons.
Geological facts
Nephrite is actually tougher (more resistant to fracturing) than Jadeite, despite being slightly softer on the Mohs scale. It has been a sacred stone in Chinese culture for over 5,000 years, often called 'The Stone of Heaven.'
Field identification & locations
Identify in the field by its soapy or greasy feel when polished and its extreme toughness (it does not shatter easily). Commonly found in alluvial deposits or as boulders in rivers. Notable locations include British Columbia (Canada), Wyoming (USA), and New Zealand.
More like this
