Colour
Most gem quality diamonds fall within a range from “D” colourless to “Z” light yellow. Almost all have a trace of yellow, brown or gray body colour. The colour of a diamond is determined on the basis of a visual assessment by comparing it to a set of master diamonds under laboratory conditions. The differences between colours are very subtle and graded according to the International Colour Grading Scale. With the exception of some natural fancy colours, such as blue, pink, purple, yellow or red, the colorless grade is the most valuable.
Due to inaccuracy and inconsistency, colour machines are not used to grade diamonds by any of the internationally recognised laboratories. The prescribed method for grading colour is by comparing the diamond to a registered master set.
Roll your mouse over the colour bar below to change the colour of the diamonds:
Note: The colours presented here are simply a rough guide and are not accurate.
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.