Bearding refers to tiny, hairline cracks along the girdle of a diamond that look like whiskers penetrating into it; the girdle can then appear to have a “fuzzy” outline. Bearding can affect both the clarity grade and the polish grade of a diamond.
A very dark, opaque diamond which appears black. Black diamonds are heavily included with graphite, blocking all or almost all transmission of light.
A blemish is a flaw on the exterior of a diamond, such as a scratch, abrasion, nick or chip. Blemishes are plotted (drawn) in “green” on the plotting diagram of a diamond certificate. Blemishes affect the polish grade of a diamond.
Diamonds that originate from areas controlled by rebel forces that are opposed to the governments in power, and are used to finance wars against these governments along with other resources like oil and timber. The Kimberley Process has been put in place to combat trade in blood diamonds, also known as 'conflict diamonds'. Click here to learn more about conflict diamonds and the Kimberley Process.
A coloured diamond with a natural blue body colour. Blue must be the predominant colour, but it may be modified by shades of grey, purple, or green. The colour in natural blue diamonds is created by the carbon-boron when the diamond is forming. Natural blue diamonds are extremely rare; some blue coloured diamonds with sufficient saturation fall into the valuable fancy blue colour category of diamonds.
The bow tie effect is a dark shadow across the center of a fancy shape diamond, in the shape of a man’s bow tie. This may be a sign of a poorly cut diamond - it is normally seen in diamonds that are cut too flat, too deep, or with badly arranged pavilion facets.
A small folded envelope-like paper used to safely hold a diamond. Information about the diamond is generally written or printed on the outside of the briefca.
The amount and intensity of light reflected to the eye through the surface of a diamond. Brilliance is a very important factor in creating beauty and life in a diamond. The proportions of the diamond are most important for light return, but all aspects of the four c’s contribute to creating brilliance.
A style of diamond cut, using triangular or kite shaped facets that radiate out from the center of the diamond to the girdle. The standard round brilliant cut consists of 32 facets plus a table above the girdle and 24 facets plus a culet below the girdle. Other shapes besides round can be faceted as brilliant cuts, including marquise cut, oval cut, pear cut, heart cut, and radiant cut diamonds.
Diamond cut or shaped into a full tear-drop with a circular cross section; briolettes are generally covered with triangular facets.
In natural diamond the colour is related to a lattice imperfection. This can be mimicked in synthetic or treated diamond by a variety of treatments including annealing, heating or irradiating. The heat and pressure or irradiation can result in the lattice deviation resulting in the brown or pink colour.
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.