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Hydrohetaerolite

- Formula
- Zn2Mn3+4O8·H2O
- Crystal System
- Tetragonal
- Crystal Habit
- Radial, Botryoidal, Massive
- Cleavage
- Good, None, None
- Luster
- Sub Metallic
- Color
- brownish black, dark brown
- Streak
- dark brown
- Class
- Tetragonal - Ditetragonal Dipyramidal
- Hardness
- 5-6
- WebMineral
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- Mindat
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Hydrohetaerolite from Precaución mine, Cartagena, Murcia, Spain

Steely greyish blue acicular crystals throughout matrix exposed on the surface as uneven bubbly crusts.
Click thumbnail images for larger view.