User blog comment:ZanyDragon/Eagle/@comment-6024608-20131102071752/@comment-6024608-20131106083131

It was often comperable to gold in price  - not enough difference (like a magnitude) to warrant coins made of it.

Gold is easy to tell from silver. Platinum is brigher (it is much less corrodable) than silver but still similar

Also how high do the denominations have to go for 'money' ?? Bigger amounts you just start having paper promissory notes  (backed by the Prophet himself!!)