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Leifite (Na2(Si,Al,Be)7(O,OH,F)14) NS2864.01 |
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| Crystal system | hexagonal. |
| Habit | usually found as fibrous or acicular in habit and often striated; it can also be found as simple hexagonal crystals. |
| Cleavage | distinct. |
| Fracture | none. |
| Hardness | 6 |
| Specific Gravity | 2.5 |
| Color | colorless to white. |
| Luster | transparent with a vitreous to silky luster. |
| Streak | none. |
| Distinguishing features | heavy striations on the white or colorless hexagonal prisms are typical. |
| Uses | of interest to collectors and researchers. |
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