Weddellite
Mineral CaC2O4·2H2O
About it
Tiny dipyramidal calcium oxalate crystals first found in sea-floor mud of the Weddell Sea, Antarctica. Also forms in plants, lichens, and kidney stones, and slowly turns to whewellite.
- Type
- Mineral
- Group
- Organic compound, oxalate
- Formula
- CaC2O4·2H2O
- Hardness (Mohs)
- 4
- Specific gravity
- 1.94
- Streak
- white
- Lustre
- vitreous (glassy)
- Crystal system
- Tetragonal
- Colours
- colourless, white, yellowish, brown
- Transparency
- transparent, translucent
Typical values: real specimens vary. For more, see mindat.org.