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Britannia metal (also called britannium, Britannia ware, [1] or Vickers White Metal [2]) is a specific type of pewter alloy, favoured for its silvery appearance and smooth surface. The composition by weight is typically about 92–93% tin , 5–6% antimony , and 2% copper .
Britannia silver is an alloy of silver containing 11 ozt 10 dwt (i.e. 11½ troy oz.) silver in the pound troy, equivalent to 23 ⁄ 24, or 95.833% by weight silver, the rest usually being copper. This standard was introduced in England by Act of Parliament in 1697 to replace sterling silver (92.5% silver) as the obligatory standard for items of ...
Pewter (/ ˈ p juː t ər /) is a malleable metal alloy consisting of tin (85–99%), antimony (approximately 5–10%), copper (2%), bismuth, and sometimes silver. [1] In the past, it was an alloy of tin and lead , but most modern pewter, in order to prevent lead poisoning , is not made with lead.
In 2013 the average price paid per ounce of pure silver was $4.12 up from $4.06, $3.99, $3.97 in 2012, 2011, 2010. Penasquito (one of the largest silver deposits in the world, Silver Wheaton's 25% interest would rank in the top 25 silver mines in the world) will give the company an average of 7 million ounces annually for 22 years (begins early ...
Silver prices since 2000 until April 2015. Price quotes given in USD per ounce. Date: 21 April 2015: Source: based on www.kitco.com; using price quotes for silver .
The price of silver has risen fairly steeply since September 2005, being initially around $7 per troy ounce, but reaching $14 per troy ounce for the first time by late April 2006, and the average price of the month was $12.61 per troy ounce.
The first legal definition of sterling silver appeared in 1275, when a statute of Edward I specified that 12 troy ounces of silver for coinage should contain 11 ounces 2 + 1 ⁄ 4 pennyweights of silver and 17 + 3 ⁄ 4 pennyweights of alloy, with 20 pennyweights to the troy ounce. [11] This is (not precisely) equivalent to a millesimal ...
While the term pewter covers a range of tin-based alloys, the term English pewter has come to represent a strictly-controlled alloy, specified by BSEN611-1 and British Standard 5140, consisting mainly of tin (ideally 92%), with the balance made up of antimony and copper. Significantly, it is free of lead and nickel. Although the exact ...