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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.
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 99.9% pure gold. In 2012, the Perth Mint produced a 1-tonne coin of 99.99% pure gold with a face value of $ 1 million AUD, making it the largest minted coin in the world with a gold value of ...
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Iridium is the most corrosion-resistant metal known as it is not attacked by acids, including aqua regia. In the presence of oxygen, it reacts with cyanide salts. Traditional oxidants also react, including the halogens and oxygen at higher temperatures. Iridium also reacts directly with sulfur at atmospheric pressure to yield iridium disulfide.
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Iridium (IRDM) performance has been benefiting from a growing subscriber base and a robust demand for consumer-oriented devices. Factors to Note Ahead of Iridium (IRDM) Q3 Earnings Release Skip to ...
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Iridium. Cost: $53.37 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 for ...