There are well over 150 companies actively mining or exploring for mineral resources in Nevada. Investment in most mining companies is made through stock purchases by licensed brokers. Legitimate mining companies do not generally solicit investors by telephone or mail. Investments take many forms, which can be confusing. Consult a reputable financial adviser and deal through a recognized merchant, broker, or financial institution.
Processes used by mining companies to extract precious metals are well-known and understood.
Almost all use one form or another of cyanide leaching. The average ore grades at most Nevada mines range from 0.04 to 0.20 troy ounces of gold per ton. Precious metals do not mix. Platinum and palladium have not been mined in Nevada since 1919 and, more than likely, will not be for the foreseeable future. Iridium, osmium, ruthenium, and rhodium have never been mined in Nevada.