Carat Weight
The weight of a diamond is expressed in carats. 1 carat equals 0.2 grams. A carat is further subdivided into 100 points.
0.50 ct = 1/2 carat = 50 points.
Weight is the most obvious factor in determining the value of a diamond. But two diamonds of equal weight can have very unequal values, depending on their quality. Furthermore weight only indicates size. Depending on proportions two diamonds weighing the same may appear very different in size. Internationally, the weight of a diamond is mentioned to two decimal places.
Roll your mouse over the diamonds below to compare their Carat Weight:

Note: Due to the differences between monitors and resolutions settings, the sizes shown here are not accurate. They are only meant to be an educational guide.
The diamond trading floor that gives all diamond buyers direct access to DCLA guaranteed diamonds from Australian diamond dealers.
latest news
Friday 26 June, 2009
'HOW TO BUY A DIAMOND' WORKSHOP SATURDAY 25 JULY
Diamond buying made easy...register now for the next 2-3 hour hands-on workshop covering diamond quality and diamond buying taught by the Diamond Certification Laboratory of Australia.
Wednesday 17 June, 2009
SYNTHETIC DIAMONDS ON THE MARKET IN AUSTRALIA?
A synthetic diamond has been identified by the DCLA, on the heels of the recent discovery of numerous treated diamonds in Australia.
Friday 29 May, 2009
BLUE DIAMOND FETCHES RECORD PRICE FOR GEM
A rare natural fancy vivid blue diamond sold for a world record price of almost US$9.5 million (AU$12.2 million) at auction in Geneva this month.