metamorphic
Noble Serpentine
Antigorite (Mg3Si2O5(OH)4)
Hardness: 3–6 on Mohs scale; Color: Pale yellowish-green to lime green; Luster: Waxy, greasy, or silky; Crystal Structure: Monoclinic; Cleavage: Good/basal; Specific Gravity: 2.5–2.6.
- Hardness
- 3–6 on Mohs scale
- Color
- Pale yellowish-green to lime green
- Luster
- Waxy, greasy, or silky
Identified More metamorphic →
Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 3–6 on Mohs scale; Color: Pale yellowish-green to lime green; Luster: Waxy, greasy, or silky; Crystal Structure: Monoclinic; Cleavage: Good/basal; Specific Gravity: 2.5–2.6.
Formation & geological history
Formed through the hydro-thermal alteration of ultramafic rocks (like peridotite) in the Earth's crust, a process known as serpentinization. This specimen typically originates from metamorphic belts and can date back hundreds of millions of years.
Uses & applications
Commonly used for ornamental carvings, cabochons for jewelry, and as a decorative stone in architecture. High-quality translucent pieces are often marketed as 'Healerite' or 'New Jade' in the gemstone market.
Geological facts
Serpentine is the official state rock of California. The variety 'Noble Serpentine' is distinguished from common serpentine by its translucency and vivid green hues, which are caused by the presence of iron or nickel.
Field identification & locations
Identify in the field by its soapy or waxy feel and its relatively low hardness (can often be scratched by a steel blade). It is commonly found in areas of tectonic subduction zones, such as the Appalachian Mountains, the Urals, or the Coast Ranges of California.
More like this
