Hey
I fully understand this problem no matter what RN will do it will never be fair, so another way out of this could be look into history books.
What do a country with to high inflation - Yes either U change coins to a new coin or devalue ate the coin.
In this case i think - find a new metal, and offer all with diamants to exchange to new metal in a rate RN decide, then U can take the offer or not, and If Rn is very nice U can exchange to gold in another exchange rate, and we all start up again with a new metal.
Cheers Rype