metamorphic
Nephrite Jade
Ca2(Mg, Fe)5Si8O22(OH)2
Hardness: 6-6.5 (Mohs); Color: Olive to forest green with mottled yellow-green patches; Luster: Vitreous to greasy; Crystal structure: Monoclinic (fibrous/massive); Cleavage: None (highly tough due to interlocking fibers); Specific Gravity: 2.90–3.03
- Hardness
- 6-6
- Color
- Olive to forest green with mottled yellow-green patches
- Luster
- Vitreous to greasy
Identified More metamorphic →
Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 6-6.5 (Mohs); Color: Olive to forest green with mottled yellow-green patches; Luster: Vitreous to greasy; Crystal structure: Monoclinic (fibrous/massive); Cleavage: None (highly tough due to interlocking fibers); Specific Gravity: 2.90–3.03
Formation & geological history
Formed via contact metamorphism of magnesium-rich limestones (dolostones) or through the metamorphism of ultramafic rocks. Commonly found in serpentine-rich mountain ranges.
Uses & applications
Used extensively in jewelry, ornamental carvings, and historical tools. Its incredible toughness makes it ideal for sculpture and wearable pendants.
Geological facts
Nephrite is significantly tougher than steel due to its densely interwoven fibrous structure. Historically, it was used by the Maori people of New Zealand to make ceremonial weapons and tools called 'mere'.
Field identification & locations
Identify in the field by its waxy luster and extreme resistance to breaking. Commonly found in British Columbia, New Zealand, Russia, and Wyoming. Unlike Many stones, it cannot be scratched by a common knife easily.
More like this
