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Labradorite
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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, |
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