mineral
Labradorite (Raw)
(Ca, Na)(Al, Si)4O8
AI-generated identification · may be incorrectHardness: 6-6.5 Mohs, Color: Dark grey to grey-green (base) with potential labradorescence, Luster: Vitreous to pearly, Crystal structure: Triclinic, Cleavage: Perfect in two directions
- Hardness
- 6-6
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Physical properties
Hardness: 6-6.5 Mohs, Color: Dark grey to grey-green (base) with potential labradorescence, Luster: Vitreous to pearly, Crystal structure: Triclinic, Cleavage: Perfect in two directions
Formation & geological history
Formed in mafic igneous rocks such as basalt and gabbro through the crystallization of cooling magma. It is a calcium-enriched feldspar mineral.
Uses & applications
Used primarily as a decorative stone in jewelry (when polished), architectural surfacing, and as a popular specimen for crystal collectors.
Geological facts
Named after the Labrador peninsula in Canada where it was discovered in 1770. It is famous for it magic-like play of colors called labradorescence caused by internal light reflections.
Field identification & locations
Identify in the field by its dark grey base color and rotating it under light to check for blue, green, or gold flashes. Commonly found in Canada, Madagascar, Norway, and Finland.
