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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. ...
In 1792, the gold/silver price ratio was fixed by law in the United States at 15:1, [11] which meant that one troy ounce of gold was worth 15 troy ounces of silver; a ratio of 15.5:1 was enacted in France in 1803. [12] The average gold/silver price ratio during the 20 th century, however, was 47:1. [13]
Design discontinued. 1963. The shilling, informally called a "bob", was a type of silver coinage issued by the Commonwealth of Australia, that circulated prior to the decimalisation of Australian coinage. The Australian shilling was derived from the British pre-decimal sterling pound system (the British shilling) and was first issued following ...
The Silver Kookaburra is a silver bullion coin originating from Australia, and produced at the Perth Mint starting in 1990. The coins were .999 fine silver until the 2018 edition, which increased in purity to .9999 silver. While the obverse of the coin always depicts the reigning monarch--Queen Elizabeth II during her reign and now features ...
Silver fulminate (AgCNO) is the highly explosive silver salt of fulminic acid . Silver fulminate is a primary explosive, but has limited use as such due to its extreme sensitivity to impact, heat, pressure, and electricity. The compound becomes progressively sensitive as it is aggregated, even in small amounts; the touch of a falling feather ...
Because of the low availability relative to demand, rhenium is among the most expensive industrial metals, with an average price exceeding US$6,000 per kilogram, as of mid-2009. It first traded in 1928 at US$10,000 per kilogram of metal, but traded at US$250 per Troy ounce in mid-2010. [82] It traded in July 2010, at about US$4,000–4,500/kg. [83]
In 1979, the price for silver (based on the London Fix) jumped from $6.08 per troy ounce ($0.195/g) on January 1, 1979, to a record high of $49.45 per troy ounce ($1.590/g) on January 18, 1980, an increase of 713%, with silver futures reaching an intraday COMEX all-time high of $50.35 per troy ounce and a reduction of the silver/gold ratio down to 1:17.0.
The Spanish silver dollar created a global silver standard from the 16th to 19th centuries. The silver standard [a] is a monetary system in which the standard economic unit of account is a fixed weight of silver. Silver was far more widespread than gold as the monetary standard worldwide, from the Sumerians c. 3000 BC until 1873.