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Kingman (vicinity), Arizona. An interior view of a concentrating plant where tungsten ore is crushed. The ore comes from the Boriana mine
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Kingman (vicinity), Arizona. Close-up view of the plant, which produces tungsten concentrates from ore mined in the nearby Boriana mine workings
Kingman (vicinity), Arizona. Powdered tungsten ore, mined near Kingman at the Boriana workings. This ore is used to increase the hardness of steel for cutting tools and, since the war, has been used for many vital war purposes
Kingman (vicinity), Arizona. Powdered tungsten ore, mined near Kingman at the Boriana workings. This ore is used to increase the hardness of steel for cutting tools and, since the war, has been used for many vital war purposes