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 1900 was $18.96
The average price per troy ounce of gold in 1991 was $362.11
The average price per troy ounce of gold in 1995 was $383.79
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.
I believe there are 28.56 grams in an ounce
The average price per troy ounce of gold in 1962 was $35.23
In 1853, a Troy ounce of gold was worth $20.67. It retained this value until 1934 when it was raised to $35.00 an ounce.
The average price per troy ounce of gold in 1865 was $18.93
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