Murphyite
Grand Central Mine, Contention-Grand Central Mine group, Tombstone Mining District, Cochise County, Arizona, USA
Clear prismatic crystals of murphyite. Other areas on the same specimen have the following confirmed minerals: ottoite, shieffelinite, emmonsite, and "girdite," a discredited mineral, likely a mixture of ottoite and plumbotellurite.
Please see the parent photo for more details.
The photo was taken by Michael Cox on his Keyence microscope at ...
© Marek Chorazewicz