Everyone is familiar with gold and silver coins and bullion. What other metals are available as bullion or coins, or other tradable form?

4 Answers 4


There seems to be four bullion metal coins that are commonly traded: Gold, silver, platinum, and palladium (Here are companies that trade the coins - includes prices: apmex, kitco, coloradogold).

One way to measure liquidity would be to examine the difference in the "Bid" and "Ask" prices of the different metals.

Gold has a difference of $1 on a price of $1348.40 (0.07 %)
Silver has a difference of $0.05 on a price of $23.25 (0.22 %)
Platinum has a difference of $10 on a price of $1705.50 (0.59 %)
Palladium has a difference of $5 on a price of $589.20 (0.85 %)

Gold has a very small spread for its price. To have such a small spread it must be traded a lot to determine the market price for both buyers and sellers. It seems to make sense that gold and silver have the lowest spread (and thus more liquid) since they are more well known.

There is a copper bullion coin. It's called the nickel. :)

  • Excellent observation about the narrow bid ask spread as a criteria for metals that are or aren't bullion. True bullion should have minimal transaction cost. The four metals you listed are the four most commonly (exclusively?) ones used for bullion. Good answer! Aug 11, 2011 at 23:35

Platinum is one of the metals available as bulion coin;


If you are also considering ETF trading then, Platinum and Palladium are also available.



As bullion coin it is apparently gold, silver, platinum and palladium:


I don't know which are readily traded, but I'd assume it is the first three in that list.

Wikipedia also has a list of previous metals, on the bottom of this page. That doesn't exactly answer the question of which have a relatively liquid market.


Silver, Gold, and Platinum are the most common.

I've also found places offering

  • Palladium
  • Copper

Not sure about the liquidity for the latter two.

  • 1
    Copper is running about $3.75/lb on the commodities market. That's an incredibly heavy way to store money.
    – user296
    Oct 8, 2010 at 21:12
  • @fennec Remember it costs more to have the real thing.
    – C. Ross
    Oct 8, 2010 at 22:13

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