Nephrite is the amphibole form of jade, a tough felted aggregate of actinolite-tremolite. It is not jadeite. Imperial jade is jadeite. This page is only for nephrite.
This page is only for Nephrite. Comments below are for this material.
Wikimedia Commons
Nephrite
Specimen Details
- Hardness (Mohs): 6–6.5
- Chemical Formula: Ca2(Mg,Fe)5Si8O22(OH)2
- Crystal System: Monoclinic
- Size: Specimen size varies; record the piece, not the species