
If you have ever wondered about how much gold there actually is in a 14K gold bracelet, this formula will show you how to calculate the value.
Gold in weighted in Troy ounces. One Troy ounce equals 1.097 ordinary ounces. There are 31.1034768 grams in a Troy ounce. For ease in presenting our example, we are going to use a value of $1,000 per ounce.
Assuming you have a 14K gold bracelet (no gems) weighing 1.5 grams, the formula below will give your the actual gold value. Before beginning you need to know the percentage of gold content for the various gold used in jewelry.
US Gold Marks  Percentage of Gold 
24K  100% 
18K  75% 
14K  58.3% 
12K  50% 
10K  41.7% 
Using the chart above you can see that 14K is 58.3% gold. You can then calculate the value of actual gold contained in the bracelet.
Here are the steps to calculate gold value only:
 Divide the 'Market Value of Gold' by 31.1 to get 'Gram Value'
 Multiply the 'Gram Value' x the Gram weight of the item to get 'Value"
 Multiply 'Value' x the karat percentage of gold content of item (in this case 58.3%)
 Answer = Gold value for that item
Equation for 14K gold item using $1,000 as value for 1 ounce of gold is:
The gold percentage for the different karats would need to be changed when calculating values for 10K, 18K or 24K gold content.
For more helpful information on the metal alloy content of rose, yellow, white and green gold; additional weight designations; definitions for Vermeil and rolledgold  visit Texas Antique Mall Compendium  GOLD .

