mineral
Labradorite (in rough matrix)
Labradorite (Plagioclase Feldspar)
AI-generated identification · may be incorrectHardness: 6-6.5 (Mohs), Color: Dark grey to black matrix with iridescent flashes of blue, green, yellow (labradorescence), Luster: Vitreous to pearly, Crystal structure: Triclinic
- Hardness
- 6-6
- Luster
- Vitreous to pearly, Crystal structure: Triclinic
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Physical properties
Hardness: 6-6.5 (Mohs), Color: Dark grey to black matrix with iridescent flashes of blue, green, yellow (labradorescence), Luster: Vitreous to pearly, Crystal structure: Triclinic
Formation & geological history
Forms in mafic igneous rocks such as basalt and gabbro. Often found in anorthosite.
Uses & applications
Used in jewelry, ornamental carving, and collected for its unique play of color.
Geological facts
Named after the Labrador Peninsula in Canada where it was first discovered. The iridescence is caused by light diffracting off internal twinning planes.
Field identification & locations
Identify by looking for flashes of color (labradorescence) when moved in the light. Commonly found in Canada, Madagascar, and Finland.
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