mineral
Labradorite (Polished Sphere)
(Ca, Na)(Al, Si)4O8 (Silicate mineral)
Hardness: 6-6.5 on Mohs scale; Color: Gray-green to dark gray with internal iridescence; Luster: Vitreous to pearly; Crystal structure: Triclinic; Cleavage: Two directions at nearly 90 degrees.
- Hardness
- 6-6
- Color
- Gray-green to dark gray with internal iridescence
- Luster
- Vitreous to pearly
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Physical properties
Hardness: 6-6.5 on Mohs scale; Color: Gray-green to dark gray with internal iridescence; Luster: Vitreous to pearly; Crystal structure: Triclinic; Cleavage: Two directions at nearly 90 degrees.
Formation & geological history
Forms in mafic igneous rocks such as basalt and gabbro; also found in anorthosites. It is created through the cooling and crystallization of magma deep within the Earth's crust.
Uses & applications
Primarily used in jewelry making, ornamental carvings, high-end countertops, and for spiritual/metaphysical collecting purposes.
Geological facts
Labradorite displays a unique optical phenomenon known as labradorescence, which is caused by light reflecting off microscopically thin layers of different minerals within the stone.
Field identification & locations
Can be identified by its dark base color combined with blue, green, or gold flashes of light when tilted. It is most famously found in Labrador, Canada, and Madagascar.
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