• Platinum - University of Denver

    He brought to notice a heavy black sand that had been known for some two ... he made a platinum crucible by forming it from a paste of platinum black and ...

  • The Weekend Prospector

    Easy gold extraction for the weekend prospector and small miner. With information on how to get your gold, silver and platinum from your ores and black sand

  • How to separate gold from sands - Quora

    The non-gold components will be mostly "black sand ... (often from previous prospecting) and platinum ... Gold is very easy to separate from sand because most of ...