Troy weight A grain is 20 mites, a mite is 24 droits, a droit is 20 perits, a perit is 24 blanks. In Scotland, the Incorporation of Goldsmiths of the City of Edinburgh used a system in multiples of sixteen. ("See Assay-Master's Accounts, 1681–1702, on loan from the Incorporation to the National Archives of Scotland".) Thus, there were 16 drops to the troy ounce, 16 ounces to the troy pound, and 16 pounds to the troy stone. The Scots had several other ways of measuring precious metals and gems, but this was the common usage for gold and silver. The Pound was
Wheaton Precious Metals Corporation Wheaton Precious Metals Corporation Silver Wheaton Corp. is a no longer pure play silver mining company but still the largest in the business of silver streaming. It produces over 26 million ounces and sells over 29 million ounces of silver mined by other companies (including Barrick Gold and Goldcorp) as a by-product of their main operations. In 2016 Silver Wheaton reported attributable production totaling 30.4 million ounces of and 353,700 ounces of . The Company also reported record silver and gold sales for the year, generating net earnings of US$195 million on operating cash flows of $584 million. In Q1