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
The diamond trading floor that gives all diamond buyers direct access to DCLA guaranteed diamonds from Australian diamond dealers.
Tuesday 25 April, 2017
CHRISTIE’S TO OFFER 92CT. PENDANT
A 92.15 carat diamond pendant worth up to $20 million will lead Christie’s Magnificent Jewels auction in Geneva next month.
Thursday 20 April, 2017
GRAFF UNVEILS 105-CARAT D-FLAWLESS DIAMOND
Graff Diamonds has unveiled the 105.07 carat D flawless pear shaped diamond, it has named the Graff Vendôme after its new retail outlet at Place Vendôme in Paris.
Monday 10 April, 2017
LETSENG MINE YIELDS 114CT. DIAMOND
Gem Diamonds has found a 114-carat rough diamond at its Letšeng mine in Lesotho, the miner reported Friday.
Tuesday 4 April, 2017
SOTHEBY'S SELLS 59.6 CARAT PINK FOR $94.2 MILLION AUD
Steinmetz Diamonds owned by Israeli billionaire Benny Steinmetz, spent two years cutting and polishing the Rough diamond. Which was mined by De Beers in Botswana, Southern Africa.
Thursday 30 March, 2017
DE BEERS, LUK FOOK TO CO-BRAND GRADING REPORTS
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.