Stillwater Complex got its start about 2.7 billion years ago... That's when geologic forces formed what would become the J-M Reef -- The world's highest - grade known ore body of platinum group metals. Today, the J-M Reef, stretching underground through 28 miles of southern Montana's Beartooth Mountain Range, is the site where Stillwater Mining Company produces platinum, palladium, and other precious metals. Discovered in the early 1970's, the 28 mile-long J-M Reef is part of the Stillwater Complex, a layered succession of ultramafic to mafic rocks in the earth's crust. Its uniform layers of mineral concentrations and proximity to the earth's surface make the J-M Reef a world class ore body for PGM's.
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