Troy Ounce
One Troy ounce of gold weighs 31.1035 grams.
One ounce of gold is accepted
to mean 31.1 grams of pure 24 carat gold although in reality it is likely
to be 0.9999% pure, often called four nines.
Imperial ounces, equivalent
to 28 grams, are not used.
Gold Content
A carat is both a unit of weight and also an indication of fineness, that
is, a value for the percentage of pure gold content. 24 carat gold represents
100% gold with no alloy content.
Example:
A one ounce, 1 (Troy) ounce, 9ct gold bracelet weighs 31.1gms.
Actual gold content is (9/24)*31.1=11.66gms of pure (24ct) gold. This also
means that (31.10-11.66) 19.44 gms in every troy ounce are other alloys.
These alloys, like silver and copper, give rise to the qualities of the metal
such as colour and hardness.
| Metal: |
Parts Per Thousand |
Gold Content/Troy oz |
| 9ct gold |
375 |
11.66 gms |
| 14ct gold |
585 |
18.14 gms |
| 18ct gold |
750 |
23.33 gms |
| 22ct gold |
916 |
28.51 gms |
| 99% pure gold |
990 |
30.79 gms |
| 99.9% pure gold |
999 |
31.07 gms |
| 24ct 100% pure gold |
1000 |
31.104 gms |
The final price you pay will be based upon the gold price at the point
at which you order , and the EXACT weight of the items you have selected.
The weights quoted are estimates and individual items vary slightly due
to manufacturing tolerences. See also 
Price and Price
Per Gram.