![[Untitled photo, possibly related to: 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]. Sourced from the Library of Congress.](https://images.rawpixel.com/image_200/cHJpdmF0ZS9sci9pbWFnZXMvd2Vic2l0ZS8yMDIyLTA0L2xvYzIwMTc4NjcwNzUtaW1hZ2UuanBn.jpg)
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[Untitled photo, possibly related to: 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]. Sourced from the Library of Congress.
[Untitled photo, possibly related to: 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]. Sourced from the Library of Congress.
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