What does karat indicate?
The term karat indicates the amount of gold as a total percentage of 100. For example 24 karat is 100% gold. So 10 karat would be about 41% pure gold.

Below is the metric unit conversion to inches (in approximation).
- 3 mm = 1/8 inch
- 6 mm = 1/4 inch
- 13 mm = 1/2 inch
- 19 mm = 3/4 inch
- 25 mm = 1 inch
- 50 mm = 2 inches
- 75 mm = 3 inches

What is DWT?
DWT or 1 pennyweight is about 0.055 ounces.