Labradorite
| Synonyms: | Black Moonstone, Carnatite, Labrador Felspar, Labrador Moonstone, Mauilite, Opaline Feldspar, Radauite, Silicite |
| Variety of: | Anorthite |
| Classification: | Silicates, Tektosilicates, Feldspar Group |
| Chemical formula: | (Ca,Na)[Al(Al,Si)Si2O8] |
| Crystal system: | triclinic |
| Density (g/cm3): | 2,8 measured |
| Cleavage: | Perfect on (001), distinct on (010) |
| Fracture: | Uneven to conchoidal |
| Hardness (Mohs): | 6-6,5 |
| Colour: | Pale green, blue, colourless, grey-white |
| Lustre: | Sub-Vitreous, dull |
| Streak: | White |
| Type locality: | Ford Harbour, Paul Island, Labrador, Newfoundland and Labrador, Canada |
| Application: | Gemstone, Ornamental stone, |