metamorphic
Jade (likely Nephrite)
Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)
Hardness: 6-6.5 on Mohs scale; Color: typically dark green or sage, but can be white or creamy; Luster: vitreous to greasy; Crystal Structure: Monoclinic (fibrous aggregates); Specific Gravity: 2.9 to 3.03; High toughness.
- Hardness
- 6-6
- Color
- typically dark green or sage, but can be white or creamy
- 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 on Mohs scale; Color: typically dark green or sage, but can be white or creamy; Luster: vitreous to greasy; Crystal Structure: Monoclinic (fibrous aggregates); Specific Gravity: 2.9 to 3.03; High toughness.
Formation & geological history
Formed via regional metamorphism of magnesium-rich rocks (like serpentinite) or through contact metamorphism of dolomitic limestones. Often found in boulders alongside rivers.
Uses & applications
Primary use is in fine jewelry (pendants, beads, rings) and ornamental carvings due to its incredible toughness and historical value in Asian cultures.
Geological facts
Nephrite is one of two minerals commonly called 'Jade' (the other being Jadeite). It is extremely tough because of its interlocking felted fibrous structure, making it harder to break than diamond.
Field identification & locations
Identify by its 'greasy' feel and high density. It cannot be scratched by a steel knife. Common locations include New Zealand, British Columbia (Canada), Taiwan, and China.
More like this
