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Natrolite (Na2Al2Si3O10·2H2O) NS3893.01 |
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| Crystal system | orthorhombic. |
| Habit | usually in radiating crystal groups, fibrous, massive, and granular. |
| Cleavage | perfect. |
| Fracture | uneven. |
| Hardness | 5-5.5 |
| Specific Gravity | 2.20-2.26 |
| Color | colorless, white pink or yellowish. |
| Luster | transparent with vitreous or pearly luster. |
| Streak | white. |
| Distinguishing features | light color and commonly fibrous habit. |
| Uses | of interest to scientists and collectors. |
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