Tael - Is a traditional Chinese unit of weight for gold. One tael equals 1.20337 troy ounces, which equals 37.4290 grams. The nominal fineness of a Hong Kong tael bar is .990 but in Taiwan 5 and 10 tael bars can be 9999 fine.

Tola - Is a traditional Indian unit of weight for gold. One tola equals 0.375 troy ounces, which equals 11.6638 grams.10 tola equals 3.75 troy ounces.

Toning - Is formed on a coin as a result of the metal interacting with its environment over time. The colors that can form on a coin can be spectacular if the right circumstances occur.

Troy Ounce - (ozt.) - Is the unit of measure for all precious metals. There are exactly 31.1034768 grams in a troy ounce, though most go by 31.1 grams. The word "troy" is believed to have originated from the ancient fair of Troyes, in Champaign, France dating back to the 5th century. The fair of Troyes brought merchants and traders from several countries and cultures, so the troy ounce was created to provide one consistent unit of measurement for everyone. There has also been some speculation that the word originated from Troy of ancient Greece, but nothing has ever been substantiated to that fact.

Troy Pound - Many are confused with the troy pound and how many ounces are in a troy pound. It is important to know that while a regular pound is 16 ounces avoirdupois, a troy pound is 12 troy ounces. Some metals will say one troy pound and it is important that you understand that you are getting 12 troy ounces of bullion, not 16 avoirdupois ounces of bullion.