metamorphic
Nephrite Jade
Ca2(Mg, Fe)5Si8O22(OH)2
Hardness: 6-6.5 on Mohs scale; Color: Sage to deep forest green with mottled patterns; Luster: Vitreous to greasy; Crystal Structure: Monoclinic (fibrous interlocking structure); Specific Gravity: 2.90–3.03.
- Hardness
- 6-6
- Color
- Sage to deep forest green with mottled patterns
- Luster
- Vitreous to greasy
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Physical properties
Hardness: 6-6.5 on Mohs scale; Color: Sage to deep forest green with mottled patterns; Luster: Vitreous to greasy; Crystal Structure: Monoclinic (fibrous interlocking structure); Specific Gravity: 2.90–3.03.
Formation & geological history
Formed through the metamorphism of magnesium-rich limestones/dolomites or serpentinite rocks. This specimen is a tumbled/polished pebble, likely from a secondary alluvial deposit or riverbed.
Uses & applications
Used for ornamental carvings, jewelry, cabochons, and as a healing stone in metaphysical practices.
Geological facts
Nephrite is one of two distinct minerals known as jade (the other being jadite). It is famous for its extreme toughness due to an interlocking fibrous structure, making it harder to break than steel in some respects.
Field identification & locations
Identify in the field by its waxy luster, extreme toughness, and cool-to-the-touch feel. Common locations include British Columbia (Canada), New Zealand (pounamu), and Western Australia.
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