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Dawsonite (NaAl(CO3 )(OH)2) D02380A |
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| Crystal system | orthorhombic. |
| Habit | prismatic, striated crystals; also acicular or fibrous, spheres, rosettes and random aggregates. |
| Cleavage | perfect. |
| Fracture | none. |
| Hardness | 3 |
| Specific Gravity | 2.45 |
| Color | colorless or white. |
| Luster | transparent and crystals are vitreous while aggregates are silky in luster. |
| Streak | none. |
| Distinguishing features | occasionally small cubes of fluorite and orange sphalerite occur on dawsonite crystals. |
| Uses | of interest to collectors and scientists. |
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