Well, it seems embargoes (or is that embargos?) are made to be broken.
So osmium.... a fascinating metal. Rare and expensive. A small by-product of platinum mines.
How expensive? According to
https://www.osmium-preis.com/en/price/usd/x/daily/ today's price of $1,869 per gram calculates to over $58,000 per troy ounce, about 30x more expensive than 24k gold.
Retail on the Antarctique S Frozen Star is US$85,700