| Alumohydrocalcite | |
| Formula: | CaAl(CO)(OH)·4HO |
| Imasymbol: | Ahcal |
| Color: | Chalky white to pale blue, pale yellow, cream, gray; pale rose or brownish pink to dark violet in Cr-bearing varieties |
| Tenacity: | Brittle |
| Mohs: | 2.5 |
| Diaphaneity: | Transparent, Translucent, Opaque |
| Gravity: | 2.21 - 2.24 |
Alumohydrocalcite (IMA symbol: Ahcal[1]) is a calcium aluminium carbonate mineral with the chemical formula CaAl(CO)(OH)·4HO. Its type locality is Khakassia, Russia.[2]