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It is followed by caesium, iridium and palladium by mass and iridium, gold and platinum by volume. Carbon in the form of diamond can be more expensive than rhodium. Per-kilogram prices of some synthetic radioisotopes range to trillions of dollars.
Bullion coins' minting by national governments gives them some numismatic value in addition to their bullion value, as well as certifying their purity. American Platinum Eagle bullion coin One of the largest bullion coins in the world was the 10,000-dollar Australian Gold Nugget coin minted in Australia, which consists of a full kilogram of 99. ...
The Willamette Meteorite, the sixth-largest meteorite found in the world, has 4.7 ppm iridium. [59] Iridium is one of the nine least abundant stable elements in Earth's crust, having an average mass fraction of 0.001 ppm in crustal rock; gold is 4 times more abundant, platinum is 10 times more abundant, silver and mercury are 80 times more ...
15. Iridium. Cost: $162.26 per gram. Iridium is a hard, silvery metal that is one of the rarest in the world. It's also extremely corrosion resistant. Iridium is mainly used as a hardening agent ...
27. To'ak Chocolate. Cost: $5 per gram and up To’ak Chocolate is the rarest and most valuable in the world. The company sources its cacao from certified Ecuadorian heirloom Nacional cacao pods ...
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Daggett, Parker, World-Wide Heritage Auctions: January 2005 $1,020,000 1863 $20 PR-65+ United States Eliasberg Heritage Auctions May 2022 $1,012,000 1921 $20 United States Hesselgesser Goldberg September 2007 $1,006,250 1796 With Stars $2.50 United States Byron Reed Heritage Auctions: January 2008 $1,006,250 1885 Trade Dollar United States Norweb
Read on for a roundup of the most valuable coins from the 1930s, ’40s, ’50s and ’60s to see if you may have hidden treasure of your own. Check Out: These 11 Rare Coins Sold for Over $1 Million