metamorphic
Nephrite Jade
Ca2(Mg,Fe)5Si8O22(OH)2 (Actinolite-Tremolite series)
Hardness 6-6.5 on Mohs scale, pale yellowish-green to whitish-green color, greasy to waxy luster, monoclinic crystal structure (microcrystalline/fibrous aggregate), extremely tough and resistant to fracture.
Identified More metamorphic →
Explore Nephrite Jade in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness 6-6.5 on Mohs scale, pale yellowish-green to whitish-green color, greasy to waxy luster, monoclinic crystal structure (microcrystalline/fibrous aggregate), extremely tough and resistant to fracture.
Formation & geological history
Forms through contact metamorphism of ultramafic rocks or magnesium-rich limestones in high-pressure metamorphic environments.
Uses & applications
Used primarily in jewelry, cabochons, carvings, decorative ornaments, and historically in tools and weapons due to its extreme toughness.
Geological facts
Nephrite is famous for being one of the two distinct mineral species referred to as 'jade' (the other being jadeite). It is renowned for its exceptional toughness, stronger even than steel in resisting impact.
Field identification & locations
Identified by its waxy-to-greasy luster, pale green hue, smooth soapy feel, and extreme resistance to scratching or breaking. Commonly found in China, Russia, Canada (British Columbia), New Zealand, and Wyoming, USA.
More like this
