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One-troy-ounce (480 gr; 31 g) samples of germanium, iron, aluminium, rhenium and osmium A Good Delivery silver bar weighing 1,000 troy ounces (83 troy pounds; 31 kg) Troy weight is a system of units of mass that originated in the Kingdom of England in the 15th century [ 1 ] and is primarily used in the precious metals industry.
Such scales are used to make the most accurate of fine measurements, such as in the needs of empirical chemistry. Avoirdupois ( / ˌ æ v ər d ə ˈ p ɔɪ z , ˌ æ v w ɑːr dj uː ˈ p w ɑː / ; [ 1 ] abbreviated avdp. ) [ 2 ] is a measurement system of weights that uses pounds and ounces as units.
The original mercantile pound of 25 shillings or 15 (Tower) ounces was displaced by, variously, the pound of the Hanseatic League (16 tower ounces) and by the pound of the then-important wool trade (16 ounces of 437 grains). A new pound of 7,680 grains was inadvertently created as 16 troy ounces, referring to the new troy rather than the old ...
A short assay ton is approximately 29.17 g (1.029 oz) and a long assay ton is approximately 32.67 g (1.152 oz). [ 12 ] [ citation needed ] These amounts bear the same ratio to a milligram as a short or long ton bears to a troy ounce .
ton: tonne: 2,000 lb 907.18474 kg: cental or hundredweight: quintal: 100 lb 45.359237 kg pound: livre: 0.45359237 kg 453.59237 g: ounce: once: 1 ⁄ 16 lb or 437 + 1 ⁄ 2 grains 28.349523 g dram: drachme: 1 ⁄ 16 oz 1.771845195 g grain: grain: 1 ⁄ 7,000 lb 64.79891 mg: precious metals: troy ounce: once troy: 480 grains 31.1034768 g precious ...
As of July 24, the spot price is $2,397.50 per troy ounce. A troy ounce equals 1.097 standard ounces, or about 10 percent more, and it’s the standard measure for the weight of gold. A pound is ...
The apothecaries and troy pounds are divided into 12 ounces (of 480 grains) while the avoirdupois pound has 16 ounces (of 437.5 grains). The unit of volume, the gallon , has different values in the United States and in the United Kingdom – the US fluid gallon being about 0.83 imperial gallons and the US dry gallon being about 0.97 imperial ...
The troy ounce is the only unit of the system in current use; it is used for precious metals. Although the troy ounce is larger than its avoirdupois equivalent, the pound is smaller. The obsolete troy pound was divided into 12 ounces, rather than the 16 ounces per pound of the avoirdupois system.