Not Financial Advice: As of November 7, 2012, the price of 3.5 grams of gold is approximately $193.73. The price of 1 gram of gold is currently $55.35, while the price of 1 ounce of gold is $1,721.16. The price of 1 kilogram of gold is $55,340.76.
These prices are for the purest type of gold, 24 karat gold, which is nearly 100% pure.
Gold that is 75% pure, or 18 karat gold, is $41.46/gram. 12 karat gold (50% pure) is $27.64/gram, while 8 karat gold is $18.43/gram.
Though the scale goes all the way to 0 karat gold, gold less pure than 8 karat gold is rarely ever sold. The price of gold went up slightly the day before the 2012 Presidential Election, by $8 per ounce. It continued to rise slightly on Election Day as well.