Dellaite, Rustumite, Spurrite
Negra Mine, Maconi, Cadereyta de Montes Municipality, Queretaro, Mexico
Labelled as "dellaite and rustumite in spurrite" from Querétaro, Mexico. The assigned locality detail is assumed, as this is the only location for spurrite in the MinDat database that corresponds to the label. An accompanying description indicates that the two minerals occur as intermixed white grains in the spurrite.
S131-27
Specimen ...
© 2007, JGW, courtesy of Photographic Guide to Mineral Species