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Graphite flakes can cost around US$0.9/kg carbon. [20] Price of synthetic industrial diamond for grinding and polishing can range from 1200 to 13 300 USD/kg, while cost per weight of large synthetic diamonds for industrial applications can be on the order of million dollars per kilogram. [21] 7: N: Nitrogen: 0.0012506: 19 (5.263 × 10 17 kg) 0. ...
Global map of countries by tariff rate, applied, weighted mean, all products (%), 2021, according to World Bank. This is a list of countries by tariff rate. The list includes sovereign states and self-governing dependent territories based upon the ISO standard ISO 3166-1. Import duty refers to taxes levied on imported goods, capital and ...
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 ...
Iridium in bulk metallic form is not biologically important or hazardous to health due to its lack of reactivity with tissues; there are only about 20 parts per trillion of iridium in human tissue. [22] Like most metals, finely divided iridium powder can be hazardous to handle, as it is an irritant and may ignite in air. [66]
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 platinum.
As a stunt to publicise the 99.999% pure one-ounce Canadian Gold Maple Leaf series, in 2007 the Royal Canadian Mint made a 100 kg 99.999% gold coin, with a face value of $1 million, and now manufactures them to order, but at a substantial premium over the market value of the gold. [3] [4]
The former Indiana University basketball team doctor accused of sexually assaulting players back in the 1990s invoked his Fifth Amendment right against self-incrimination dozens of times during a ...
The international prototype of the kilogram (IPK) is an artifact standard of platinum–iridium alloy that was defined as having a mass of exactly one kilogram. Platinum–iridium alloys are alloys of the platinum group precious metals platinum and iridium. Typical alloy proportions are 90:10 or 70:30 (Pt:Ir).