Wieland Precious Metals
Tanaka Precious Metals
Oxford Assaying & Refining
Morvillo Precision Products
Mel-Co-Ed Inc.
LGS Refining
Koos
Jewelers Refining Group Inc.
Horizon Metals
General Refining Corporation
David H. Fell & Co. Inc.
Eric Precious Metal Refining
Cimini & Associates
Australian Refiners
Ross Metals Corp.
Myron Toback Inc.
Hoover & Strong Inc.