Platinum: why .9995?

Discussion in 'Bullion Investing' started by myownprivy, Jul 6, 2019.

  1. myownprivy

    myownprivy Well-Known Member

    Looking for some information:

    1. Why is most "pure" platinum sold in bullion form only .9995 fine?

    2. What is the balance? Is it other platinum group metals?
    Cheech9712 likes this.
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  3. Cheech9712

    Cheech9712 Every thing is a guess

    Beats me
  4. Cheech9712

    Cheech9712 Every thing is a guess

    Good question
  5. desertgem

    desertgem MODERATOR Senior Errer Collecktor Moderator

    It is most likely the .0005 is the other the other members of the platinum group iridium, osmium, palladium, and rhodium, as they have to use a chemical approach to the refining ( although there are some electrochemical methods which are available). In parts of the world jewelers consider the mix of the platinum group to be "platinum" also. So they can advertise and sell 100% platinum rings, etc. Since gold can be refined much more readily, and already have a kt. rating by percentage you can expect correct %.
    But .999% gold or platinum can be scratched and bent very easily.

    I have searched looking for info on .9995 Platinum being only Platinum metals. or if the others of the platinum family also count as "platinum". Let me know if someone besides a jeweler or coin dealer says so :) Jim
    QuintupleSovereign likes this.
  6. -jeffB

    -jeffB Greshams LEO Supporter

    Here's a cool article on platinum impurities. It seems to indicate that platinum is commonly refined to only 200ppm contaminants (.9998). It looks like other Pt-group metals are considered "not bothersome" contaminants, whereas iron, silicon and other elements cause problems in specific applications.
  7. desertgem

    desertgem MODERATOR Senior Errer Collecktor Moderator

    Maybe I will just buy jewelers platinum and call it 100% if I want some. I doubt the mints worry about it. I do doubt the mint uses the equipment the article used to determine that .9998. Hmmm wonder if the catalytic converter platinum that is salvaged is analyzed closely....and who does the mints buy theirs from?

    Seems more peaceful tonight ( so far) :)
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