metamorphic

Nephrite Jade / Epidote Pebble

Ca2(Mg,Fe)5Si8O22(OH)2 / Ca2Al2Fe3+(SiO4)(Si2O7)O(OH)

AI-generated identification · may be incorrect

Hardness: 6.0-6.5 on Mohs scale. Color: Olive green to deep forest green with yellowish brown mottling. Luster: Waxy to vitreous. Structure: Fine-grained, tough microcrystalline aggregate.

Hardness: 6
Luster: Waxy to vitreous

Identified July 26, 2026More metamorphic →

Explore Nephrite Jade / Epidote Pebble in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Hardness: 6.0-6.5 on Mohs scale. Color: Olive green to deep forest green with yellowish brown mottling. Luster: Waxy to vitreous. Structure: Fine-grained, tough microcrystalline aggregate.

Formation & geological history

Formed through regional or contact metamorphism of ultramafic rocks or metasomatism of limestone and dolomite by silicate fluids.

Uses & applications

Commonly used for tumbled stones, decorative carvings, beads, cabochons, and ornamental items.

Geological facts

Nephrite is famous for its extreme toughness—it is harder to break with a hammer than steel due to its interlocking fibrous mineral structure.

Field identification & locations

Identified by its distinctive olive green hue, smooth tumbled surface, greasy/waxy luster, and high resistance to scratching. Found along rivers, beaches, and metamorphic zones globally, including New Zealand, Canada, and Russia.