metamorphic
Nuummite
Nuummite (mixture of anthophyllite and gedrite)
AI-generated identification · may be incorrectHardness: 5.5-6. Color: base is usually black, opaque; features iridescent flashes of gold, yellow, copper, red, blue, or green. Luster: vitreous. Crystal structure: orthorhombic (components). Specific gravity: 3.18-3.37.
- Hardness
- 5
- Color
- base is usually black, opaque
- Luster
- vitreous
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Physical properties
Hardness: 5.5-6. Color: base is usually black, opaque; features iridescent flashes of gold, yellow, copper, red, blue, or green. Luster: vitreous. Crystal structure: orthorhombic (components). Specific gravity: 3.18-3.37.
Formation & geological history
Formed through regional metamorphism of igneous rocks over 3 billion years ago. It is an orthoamphibole rock.
Uses & applications
Often cut and polished into cabochons, spheres, wands, and obelisks/towers for metaphysical use, collecting, and jewelry.
Geological facts
Considered one of the oldest rocks on Earth, dating back roughly 3 billion years. Discovered in Greenland in 1982.
Field identification & locations
Identified by its very dark/black matrix with distinct elongated, iridescent crystal laths (labradorescence). Most authentic Nuummite comes from the Nuuk area of Greenland.
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