![Labradorite rough fragment ((Ca,Na)[Al,Si]A̲₁O₈) — mineral](https://media.rock.id/labradorite-rough-fragment-a5334d71-da72-40ae-8ddf-0f6ca4463f56-compressed.jpg)
mineral
Labradorite rough fragment
(Ca,Na)[Al,Si]A̲₁O₈
AI-generated identification · may be incorrectHardness: 6-6.5 (Mohs), Color: Dark grey to black with iridescent blue/green flashes (labradorescence), Luster: Vitreous, 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 black with iridescent blue/green flashes (labradorescence), Luster: Vitreous, Crystal structure: Triclinic, Cleavage: Perfect in two directions
Formation & geological history
Found in mafic igneous rocks such as basalt and gabbro. Forms as magma cools slowly.
Uses & applications
Primarily used as a gemstone in jewelry, also carved for ornamental objects.
Geological facts
Named after the Labrador Peninsula in Canada where it was first discovered. The optical effect is caused by internal fractures reflecting light.
Field identification & locations
Identified by its distinctive optical effect 'labradorescence'. Commonly found in Canada, Madagascar, and Finland.
