Additional Testing, services

The Spark of Confidence

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.

latest news

Wednesday 19 July, 2017

DIAMONDS ARE ALL BILLIONS OF YEARS OLD

How you can re-purpose your existing diamonds.

Thursday 6 July, 2017

ANOTHER LARGE GEM DIAMOND RECOVERED AT LESOTHO MINE

Gem Diamonds found the high quality 126 carat, D colour Type IIa rock at Letšeng.

Monday 12 June, 2017

GEM DIAMONDS FINDS TWO LARGE ROCKS AT FLAGSHIP MINE IN LESOTHO

Africa focused Gem Diamonds has discovered two diamonds bigger than 100 carats at its Letšeng mine in Lesotho, which should help the company boost revenue and investors confidence.

Tuesday 6 June, 2017

KIMBERLEY DIAMONDS CLOSES ITS LAST MINE

Controversial Australia-based miner Kimberley Diamonds has put its last remaining diamond mine into administration after it failed to secure fresh funding.

Monday 5 June, 2017

DE BEERS GOES TO COURT OVER SOUTH AFRICA EXPORT LEVY

De Beers Consolidated Mines (DBCM) is reportedly appealing to the Pretoria High Court in South Africa to set aside a decision by the South African Minister of Minerals Mosebenzi Zwane requiring DBCM to pay a levy on diamonds exported from South Africa to Botswana for the purpose of aggregation.

Thursday 18 May, 2017

DE BEERS TAPS INTO POLISHED DIAMONDS MARKET WITH FIRST-TIME AUCTION

Anglo American’s De Beers, the world’s largest rough diamond producer by value, has decided to begin selling its own polished diamonds in auctions for the first time in its history.

Wednesday 17 May, 2017

SOTHEBY'S SELLS THE APOLLO AND ARTEMIS DIAMONDS FOR £44.9 MILLION