Rare metals

Are there coins made of metals other than the common and not-so-common ones like Platinum, Palladium, Gold, Silver, Titanium, Copper, Aluminum, Lead, Iron, Nickel, Zinc, Tin and any combination of those?

Like from the "Platinum family"? The Ru, Rh, Os and Ir?

http://www.elementsales.com/ecoins.htm

Απόσπασμα: derfhttp://www.elementsales.com/ecoins.htm

Currency, not bullion ounces. Or at least, coins with face value issued by a Government even if they aren't supposed to be used as currency.

There is one rare, expensive coin made of Antimony from a Chinese province:
https://en.numista.com/catalogue/pieces42344.html

This one is Rhodium (Rh) plated - partially, on aluminium-nickel-bronze ...
https://en.numista.com/catalogue/pieces41593.html

but not made entirely of it. And none from Iridium or Osmium or Ruthenium that I can see.

Iridium and Osmium are so hard they would probably leave an impression on the dies used to strike them.

However, Osmium is my favourite metal! It's the densest and it has a slight blue tinge. Sadly, while they sell essentially indestructible iridium wedding bands, Osmium has been neglected in the field of jewelery for far too long (probably because it's very difficult to work with).

Απόσπασμα: nalaberongThere is one rare, expensive coin made of Antimony from a Chinese province:
https://en.numista.com/catalogue/pieces42344.html

Makes me say "What where they thinking?"  

Απόσπασμα: ZacUKThis one is Rhodium (Rh) plated - partially, on aluminium-nickel-bronze ...
https://en.numista.com/catalogue/pieces41593.html

but not made entirely of it. And none from Iridium or Osmium or Ruthenium that I can see.

Sweet, it looks so cool!

Απόσπασμα: nalaberongIridium and Osmium are so hard they would probably leave an impression on the dies used to strike them.

However, Osmium is my favourite metal! It's the densest and it has a slight blue tinge. Sadly, while they sell essentially indestructible iridium wedding bands, Osmium has been neglected in the field of jewelery for far too long (probably because it's very difficult to work with).

Maybe they could make Osmium-Tungsten-Titanium alloy dies to strike on pure Osmium, might wear off after 200 strikes, but would make the coins ever more precious, just like the saying "This car is one of only ten made by this guy, and I know he only made ten cuz after he finished the tenth I had him killed". Instead of Assayer's initials like in old Mexican coins they could add the Die number (although that would surely cause the amateur collectors like me to never see a single one, as every different die mark would be a piece of collection).

I have an Osmium bar 10cm long x 1cm diameter, and hell it is dense! It is the heaviest thing that size, it is deceiving, because it looks like old white-ish Aluminum, so when you grab it you think it will be light, but then WHOOOP! you feel the weight.

Wow - if my math is right, that's about 175 grams... which is worth over USD$2000

I will have to settle for a smaller 1g pellet that sells for under $100

Απόσπασμα: nalaberongWow - if my math is right, that's about 175 grams... which is worth over USD$2000

I will have to settle for a smaller 1g pellet that sells for under $100

Yeah, and I don't know how the hell it ended up in my family possession. I consider it as my "Gold coin that isn't made of gold or is even a coin"  

My Great-grandfather was an army officer during the 1920s, he even visited Paris, Moscow and Shanghai back then, which was considered pretty rare for even the folks in Mexico City. So along with my few foreign coins he must have also gotten that bar... somewhere, maybe the CCCP or any other mining power. At least they didn't sell him some Uranium or I would be in serious trouble now.

Also, 1gr of Osmium wouldn't be that expensive. You can get a Troy Ounce for 420$, so a gram should be less than 15 dollars. The problem might be that is is so dense that 1gr might be pretty easy to lose because of the tiny size. It is around 1/3 of Gold price. Also, investing in Osmium is tricky because other than industry there is no other uses like Gold and the other precious metals. BUT, if some day someone figures out how to make it into coins or jewelry then the price would go BOOOM and surely way above Gold.