Antimony is the primary ore produced at the site, with stibnite being the chief source of this metal.
[1] During the period from 1915 to 1917, significant underground work was carried out at the site, which included driving two adits and constructing a plant to convert stibnite into antimony oxide for bathtub enamel production.
[1] In 1941, 42 tons of hand-sorted ore, with a grade of 30.47% antimony (Sb), were shipped to Harshaw Chemical Co. in Los Angeles.
[1][2] That same year, Whitestone Mines, Inc. acquired the property and secured a quitclaim deed.
[1] In 1948, seven shipments were made, totaling 47 tons of hand-sorted material that averaged 55.9% antimony (Sb).