Glossary & Picture Library, learn

The Spark of Confidence

Glossary

Saturation

Intensity and purity of colour in a diamond. Both cape series diamonds and fancy shape diamonds are graded on a scale of increasing saturation, in addition to hue and tone.

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Scintillation

Sparkle of a diamond as light reflects off of its surface when it is moving, seen as quickly shifting flashes of light. The amount and intensity of sparkle depends on the quality of polish, as well as the size, shape, and symmetrical arrangement of facets.

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Seal

Plastic covering that provides a safeguard against loose diamonds being lost or damaged. Laboratory sealing has a number of security features including electrostatic security bars, pressure-sensitive transparent adhesive and cryptoprint text which only becomes visible after opening the seal.

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Shape

Name for the basic outline of a polished diamond. Examples of shapes are round, emerald , and pear.

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Simulant

Any material that is meant to look like or imitate a diamond, but is not a natural or synthetic diamond. Examples of diamond simulants: cubic zirconia, moissanite, and glass.

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Single-Cut

Diamond cut or shaped in an old-style cut with only 16 facets- 8 on the crown and 8 on the pavilion. This simple diamond cut is still used at times today for extremely small diamonds. Also known as an eight cut.

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Star Facets

Triangle shaped facets on a round brilliant cut diamond surrounding the table facet. When viewed as a whole, they resemble an 8-point star.

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Step Cut

A style of diamond cutting creating rows or steps of elongated facets, running parallel to the girdle on both the crown and the pavilion.

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Symmetry

Degree and regularity in shape and placement of facets, how well they align and relate to each other. Symmetry is very important to the life in a diamond, especially the brilliance; it affects how light is reflected and refracted in a diamond. Symmetrical round brilliant cut diamonds often display hearts & arrows.

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Synthetic Diamond

Man-made versions of the diamonds found in the earth. Synthetic diamonds have the same chemical structure and properties as natural diamonds, but are created in a laboratory in only a few days, instead of in the earth over billions of years - they sell at a much lower price. Click here to learn more about synthetic diamonds.

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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.