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The Stillwater Mining Company and Johnson Matthey collaborate to mine and refine the palladium to a 99.95% purity. The Northwest Territorial Mint began minting the Lewis and Clark Corps of Discovery bicentennial commemorative bars and rounds in 2004. Each comes sealed in a plastic card containing the assay certificate number.
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Stillwater
Palladium
Rounds
.9995 Fine Palladium |
Item |
Weight |
Diameter |
Thickness |
| 1 oz |
1 oz |
38.1 mm |
2.28 mm |
| 1/2 oz |
1/2 oz |
30 mm |
2.16 mm |
| 1/4 oz |
1/4 oz |
25 mm |
1.40 mm |
| 1/10 oz |
1/10 oz |
19.7 mm |
1.09 mm |
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