yes it is troy ounce, 1 troy ounce = 31.1034768 http://www.answers.com/topic/gram
The average price for a troy ounce of gold in 1920 was $20.68
On the 22nd August 2012 at 8:45 GMT the price of gold was ¥335.74 per gram. 1 troy ounce = 31.1034768 grams Price of gold per gram * Number of grams per troy ounce = Price of gold per troy ounce 335.74 * 31.1034768 = 10442.6813008 1 troy ounce = ¥10442.6813008
The average price per troy ounce of gold in 1995 was $383.79
The average price per troy ounce of gold in 1991 was $362.11
The average price per troy ounce of gold in 1900 was $18.96
As of midday on July 1, 2011, the spot price of gold is US$1,484.50 per troy ounce. 22 karat gold is (22/24) = 91.666% gold, so a troy ounce of 22kt gold is worth US$1,360.79. Gold is often measured out in grains (480 per troy ounce) pennyweights (20 per troy ounce) or grams (31.1035 per troy ounce) - 22kt gold would thus have a spot price of US$2.83 per grain, US$68.04 per pennyweight, or US$43.75 per gram.
The average price per troy ounce of gold in 1962 was $35.23
The average price per troy ounce of gold in 1909 was $18.96
The average price per troy ounce of gold in 1930 was $20.65
The average price per troy ounce of gold in 1865 was $18.93
35.90 per troy ounce
Gold is not measured in standard ounces which would contain 28.3 grams per ounce. Instead, gold is measured in troy ounces, which states there are 31.1 grams per troy ounce. 425 grams ÷ 31.1 grams/troy ounce = 13.67 troy oz. of gold.