mineral
Labradorite (Gray Tumbled)
Labradorite (Ca,Na)(Al,Si)4O8
Hardness: 6-6.5 (Mohs scale), Color: Dark gray to gray-green, Luster: Vitreous to pearly, Crystal structure: Triclinic, Cleavage: Perfect in two directions, Labradorescence: Iridescent play of colors (not clearly visible in this lighting/angle).
- Hardness
- 6-6
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Physical properties
Hardness: 6-6.5 (Mohs scale), Color: Dark gray to gray-green, Luster: Vitreous to pearly, Crystal structure: Triclinic, Cleavage: Perfect in two directions, Labradorescence: Iridescent play of colors (not clearly visible in this lighting/angle).
Formation & geological history
Formed in mafic igneous rocks such as basalt and gabbro, often occurring as large crystal masses. Most significant deposits are in Labrador, Canada, and Madagascar.
Uses & applications
Used primarily in jewelry as a gemstone, as an ornamental stone in countertops or tiles, and in metaphysical collecting.
Geological facts
Labradorite is famous for 'labradorescence,' an optical effect caused by internal lamellar twinning which scatters light into flashes of blue, green, and gold.
Field identification & locations
Identify by its dark gray base color and internal flashes of color. While these specimens appear dull, rotating them under a direct light source often reveals hidden iridescence.
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