Transparency, transparency

The Spark of Confidence

What is Transparency?

Transparency, also called pellucidity, is the material property of allowing light to pass through. In mineralogy, another term for this property is diaphaneity.

The DCLA Transparency Grade is the degree to which a diamond transmits light, directly relevant to its ‘cloudiness’ or ‘haziness.’

In other words, it is a comprehensive assessment of light performance based on the quality of the diamond crystal itself.

What affects Transparency?

Diamond transparency can be affected in many ways. Certain types of inclusions, such as clouds and twinning lines, structural phenomena such as graining, and even fluorescence can have an impact on a diamond’s ability to transmit light.

That being said, diamonds of any clarity, fluorescence and cut can in fact have Very Good or Excellent Transparency, making them attractive stones. For example, fluorescence can sometimes give a diamond a ‘milky’ appearance, especially when in sunlight…but this is not always the case. It is quite possible for a fluorescent diamond to have Very Good or even Excellent Transparency.

Diamonds of almost any clarity, fluorescence, and cut can also have Good or Medium Transparency – as said, multiple features contribute to a diamond’s transparency.

The unique DCLA Transparency Grading System now takes all of these features into account to provide an even more comprehensive assessment of your diamond.

  • ExcellentCompletely transparent, no light interruption, no haze or cloud
  • Very GoodTransparent, minimal light interruption, very light haze or cloud, difficult to detect
  • GoodTransparent, some light interruption, slight visible haze or cloud, detectable
  • MediumSemi-Transparent, marked light interruption, moderate haze or cloud, easy to detect
  • PoorSemi-Transparent, very little light passes through, heavy haze or cloud

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