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Hydroboracite

Type Locality
Inder B deposit and salt dome, Atyrau (Gur'yev), Atyrau Province (Atyrau Oblysy; Atyrau Oblast'), Kazakhstan
Mineral Data
CaMg[B3O4(OH)3]2·3H2O
Strunz: 
6.CB.15
Physical Properties
Hardness: 
2.0