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Strontianite (SrCO3) D02253 |
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| Crystal system | orthorhombic. |
| Habit | needle-like crystals that symmetrically taper to a point.. |
| Cleavage | good prismatic cleavage. |
| Fracture | none. |
| Hardness | 3.5 - 4 |
| Specific Gravity | 3.7 |
| Color | colorless, white, pink, gray or green. |
| Luster | transparent to translucent with a glassy luster. |
| Streak | none. |
| Distinguishing features | often resembles celestine but unlike celestine, strontianite effervesces with warm HCl acid. |
| Uses | an ore for strontium, fireworks (red/purple flame when heated). |
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