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Platinum Group Metals
May 1999 by William M. Clem
Platinum is only one of a group of related metals that are referred to as platinum group metals (PGMs), because platinum in its native state usually contains all six metals of the group along with some iron.Ask The Experts - How do I avoid claim jumping?
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Uranium Deposits
The first reported occurrence of uranium in the United States was at Central City, Colorado, in 1871. However, prior to 1922, the ore was mined for its radium content, not uranium.
Identifying the Noble Metals Simple Tests That Work
Using a porcelain evaporating dish, place concentrates or head ore, equal to a tablespoon, in 60cc of aqua regia. Boil almost to dry, then add 10cc HCl (hydrochloric or muratic acid) and heat for a few minutes, and then add 30cc of water and bring to boil. Let cool while the solids are being allowed to settle. Using a pipette...
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