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Hummerite

Type Locality
Hummer Mine, Jo Dandy Mine (Paradox D; Hummer; C; Blackburn; Yellow Bird No. 1; Oversight; Broker), Paradox Valley, Uravan District, Montrose Co., Colorado, USA
Mineral Data
K2Mg2(V10O28)·16H2O
Strunz: 
4.HC.10
Physical Properties
Hardness: 
0.0