Nephrite Jade

Physical Properties

Hardness: 6-6.5 (Mohs scale); Color: Deep forest green, olive, or blackish-green; Luster: Vitreous to greasy; Structure: Monoclinic, felted fibrous texture (extremely tough); SG: 2.90–3.03.

Formation & Geological History

Formed through the regional metamorphism or hydrothermal alteration of ultramafic rocks (serpentinite) or metasomatism between dolomite and silicic rocks. Common in mountain building zones.

Uses & Applications

Used widely in jewelry (beads, cabochons), ornamental carvings, historical weaponry due to its toughness, and as a collector's gemstone.

Geological Facts

Nephrite is significantly tougher (more resistant to fracturing) than diamond due to its interwoven fibrous structure. It has been used for over 5,000 years in China for ritual objects.

Field Identification & Locations

Identified in the field by its characteristic waxy/greasy luster when polished, high density, and extreme resistance to breaking with a hammer. Found in British Columbia, New Zealand, Russia, and Wyoming.

Identified on: 4/22/2026

Mode: Standard