Nephrite Jade

Physical Properties

Hardness: 6-6.5 (Mohs scale); Color: Dark green to olive green; Luster: Vitreous to greasy; Crystal structure: Monoclinic (fibrous aggregates); Cleavage: Indistinct; Specific gravity: 2.90–3.03

Formation & Geological History

Formed through the metamorphism of magnesium-rich rocks (limestones or serpentinites) in the presence of silica-bearing fluids at convergent plate boundaries.

Uses & Applications

Used extensively in jewelry, ornamental carvings, statuettes, and as a durable material for traditional tools and weapons.

Geological Facts

Nephrite is one of two distinct minerals known as jade (the other being Jadeite). It is famous for its extreme toughness due to its interlocking fibrous structure, making it harder to break than steel of the same density.

Field Identification & Locations

Identify by its waxy luster and cool feel to the touch. It is found commonly in British Columbia, New Zealand (Pounamu), Russia, and China. In the field, look for smooth, water-worn boulders in riverbeds that feel heavy for their size.

Identified on: 4/13/2026

Mode: Standard