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

Tuesday 21 March, 2017

59.6 CARAT VIVID PINK DIAMOND

Sotheby's plans to auction the famous "Pink Star" diamond an internally flawless, fancy vivid pink stone at its sale in Hong Kong on April 4.

Wednesday 8 March, 2017

GIA FINDS SIGNIFICANT UNDISCLOSED SYNTHETICS

The Gemological Institute of America (GIA) recently uncovered an unusually large number of undisclosed synthetic diamonds mixed in with natural melee diamonds, the lab confirmed with Rapaport News on Monday.

Tuesday 21 February, 2017

DE BEERS PROFIT JUMPS AS DIAMOND MARKET STABILISES

Profit more than doubled for De Beers last year as trading conditions in the diamond-manufacturing sector improved and inventory levels stabilized.

Wednesday 14 December, 2016

DCLA DIAMONDS HAS LAUNCHED

Buying a diamond can be a difficult process.

Thursday 17 November, 2016

PINK DIAMOND SELLS FOR $18M AT CHRISTIE’S GENEVA

Christie’s a pink diamond at its Magnificent Jewels auction in Geneva on Tuesday at $2 million per carat.

Wednesday 9 November, 2016

BAIN CAPITAL AND BOW STREET TO ACQUIRED BLUE NILE

In a surprise announcement, online jeweller Blue Nile has entered into an agreement to be acquired by an investor group managed by Bain Capital Private Equity and Bow Street LLC.

Thursday 3 November, 2016

GRAFF SHOWCASES THE GRAFF VENUS

The 118.78 carat type IIa diamond with no fluorescence and an excellent polish and symmetry. Is a record for a heart shape.