Crystal system |
orthorhombic (crystallographic axes of unequal length that are 90 degrees from each other and have 2 fold axes and/or mirror images along 3 axes). |
Habit |
commonly as elongated rhombic prisms terminated by a rhombic pyramid. |
Cleavage |
none. |
Fracture |
splintery. |
Hardness |
4-4.5 |
Specific Gravity |
3.9 |
Color |
mainly pink, pale orange or pale gray. |
Luster |
transparent to subtranslucent with a vitreous to greasy luster. |
Streak |
none. |
Distinguishing features |
its predominately pink color is characteristic. |
Uses |
of interest to collectors and researchers.
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