Glossary & Picture Library, learn

The Spark of Confidence

Glossary

Eight Cut

Diamond cut or shaped in an old-style cut with only sixteen facets plus the table - eight on the crown and eight on the pavilion. This simple diamond cut is still used at times today for extremely small diamonds. Also known as a 'single-cut' diamond.

top

Emerald Cut

Diamond cut or shaped into a rectangle with the corners cut off, and rows or steps of elongated facets running parallel to the girdle on both the crown and the pavilion.

top

Equivalent Colour Grade (ECG)

Occasionally ‘colourless’, or cape series diamonds will have a tint of brown or grey that is not visible face-up. These diamonds are graded on the same scale of color saturation as cape series diamonds, but are graded ‘ECG’ for hue. Diamonds with ECG grading are of lower value than those with no hue. Click here to see where to find hue on a diamond Certificate.

top

Extra Facet

Facets added or remaining on a polished diamond in excess of the number usually found on a particular cutting style. Extra facets are added to remove surface imperfections, and inclusions located near the surface, without losing sizeable carat weight. Extra facets affect the polish grade of a diamond.

top

Eye-Clean

Refers to the clarity of a diamond that has no inclusions visible to the naked eye - magnification is needed to see any inclusions that may be present.

top

Eye-Visible

Refers to clarity of a diamond with inclusions that are visible to the naked eye, without magnification.

top

latest news

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.