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 20 January, 2012
WORKSHOP: DIAMOND BUYING FOR CONSUMERS
Friday 9th March - Sign up for our 2 to 3 hour hands on workshop and discover what you need to know to buy the right diamond at the right price.
Thursday 19 January, 2012
OPPENHEIMERS SELL DE BEERS DIAMONDS STAKE
South Africa’s Oppenheimer dynasty has ended a century in the diamond business which shaped the region, selling its 40% of De Beers to global miner Anglo American for A$4.91 billion.
Friday 11 November, 2011
DIAMOND BUYING WORKSHOP FOR CONSUMERS
DCLA’s next in-laboratory workshop on ‘How to Buy a Diamond’ is set for Friday December 2.
Thursday 27 October, 2011
FOR JEWELLERS: WORKSHOP FOR DIAMOND SALES STAFF
DCLA diamond experts will walk participants through a diamond course specifically tailored for on-floor sales staff, in a hands on workshop presented at the DCLA Laboratory.
Monday 29 August, 2011
JEWELLERY WORLD
A new jewellery show produced by Jewellery World, Australia’s professional jewellery magazine, and Interpoint Events, an award winning exhibition company, will be launched next year.
Friday 20 May, 2011
DCLA CELEBRATES 10 YEARS
On May 2nd, 2011 The DCLA celebrated ten years in business as one of the world’s leading diamond certification laboratories.
Wednesday 4 May, 2011
AGS LAUNCHES DIAMOND SEARCH PLATFORM
The American Gem Society, in partnership with Verichannel, announced today the launch of a specialized search engine for diamonds graded by AGS Lab, available from AGS suppliers.