Colour Authentication
Fancy Coloured Diamonds
The origin of colour in fancy coloured diamonds is of paramount importance to its value. A diamond will either be of natural colour origin as created by nature, or else it has been treated and enhanced by man.
DCLA authenticates all fancy coloured diamonds as natural prior to certification.
DCLA will not issue Diamond Grading Reports for colour treated diamonds.
A preliminary colour authentication service is available upon request.
Colourless Diamonds
Certain “white” diamonds may be enhanced to improve their colour as well. All diamonds that come into the DCLA laboratory are screened for enhancements, and referred for further testing if they do not pass the initial screening. DCLA will only issue a Diamond Grading Certificate for diamonds of natural colour origin.
Synthetic Diamond Identification
All diamonds that come into the DCLA laboratory are screened to ensure that they are natural and not man-made. Diamonds that do not pass the initial screening are referred for further testing.
DCLA will not issue Diamond Grading Reports for synthetic diamonds.
A preliminary synthetic diamond identification service is available upon request.
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.