metamorphic
New Jade (Serpentine)
Antigorite / Serpentine Group (Mg3Si2O5(OH)4)
Hardness: 2.5–5.5 on Mohs scale; Color: Light yellowish-green to lime green; Luster: Waxy, greasy, or silky; Crystal Structure: Monoclinic; Cleavage: Poor/none; Specific Gravity: 2.44–2.62
- Hardness
- 2
- Color
- Light yellowish-green to lime green
- Luster
- Waxy, greasy, or silky
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Physical properties
Hardness: 2.5–5.5 on Mohs scale; Color: Light yellowish-green to lime green; Luster: Waxy, greasy, or silky; Crystal Structure: Monoclinic; Cleavage: Poor/none; Specific Gravity: 2.44–2.62
Formation & geological history
Formed through the hydrothermal alteration of ultramafic rocks (serpentinization) in the earth's mantle and at tectonic plate boundaries. Occurs in metamorphic environments where low temperatures and high pressures exist.
Uses & applications
Commonly used for decorative carvings, tumbled stones, jewelry beads, and architectural stone (verde antique). It is often used as an affordable substitute for high-quality nephrite jade.
Geological facts
Despite the trade name 'New Jade,' it is not actually jade (nephrite or jadeite) but a mineral from the serpentine family. It has been used for centuries in China for ornaments and is sometimes called 'Bowenite' when it is the harder variety.
Field identification & locations
Identify in the field by its distinct waxy feel, lime-green color, and the fact that it can often be scratched by a steel knife (unlike true jade). It is commonly found in serpentinite belts in regions like Afghanistan, China, and New Zealand.
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