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As of 2020, the most expensive non-synthetic element by both mass and volume is rhodium. 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. ...
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 ...
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 ...
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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It’s not surprising to find a few cars on this list of the world’s most expensive things. In 2018, a 1962 red Ferrari GTO sold to an anonymous buyer at Sotheby’s auction in Monterey for $48. ...