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Siderite (Fe2+CO3) NS2153.02 |
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| Crystal system | hexagonal. |
| Habit | granular, tabular or earthy; rhombohedrons with curved faces in crystal form; rarely botryoidal (stacked bubble look) |
| Cleavage | perfect. |
| Fracture | uneven to conchoidal. |
| Hardness | 3.5-4 |
| Specific Gravity | 3.7 - 3.9 |
| Color | pale yellow to dark brown or black. |
| Luster | transparent to translucent vitreous luster. |
| Streak | white. |
| Distinguishing features | soluble with hot HCl acid; it is distinguished from eudialyte by color. |
| Uses | important iron mineral as it makes up about 48% of the mineral. |
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