A summary of the different properties regarding Diamonds and Jewellery

To classify or describe jewelry or diamonds, we use a specific vocabulary. Our vocabulary is regularly refined and learns us more about issues that are important in choosing the right jewel or the right diamond. Do not hesitate to ask us any additional information if you are not sure or if you do not understand something completely. We will gladly inform you further.

Clarity

Diamonds are formed under extreme physical conditions and because of this, no diamond is free of imperfections. These imperfections can impede the passing of light through the diamond and therefore lessen the brightness of a stone. However, minor inclusions can be useful since they can contribute to the unique character of a diamond. Flaws are examined by experts under 10x magnification and can be divided under tzo categories: internal characteristics or inclusions and external characteristics or blemishes.

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FL - Flawless

No inclusions or blemishes are visible to a skilled grader using 10× magnification.

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IF - Internally Flawless

IF diamonds are free from internal characteristics/inclusions when examined under 10x magnification. A diamond is not disqualified from the Loupe Clean grade if internal graining is not reflective, white or coloured and does not significantly affect transparency.

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VVS1 - Very, Very Slightly Included 1

VVS1 diamonds contain minute internal characteristics/inclusions. These are extremely difficult to observe when examined under 10x magnification.

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VVS2 - very, Very Slightly Included 2

VVS2 diamonds contain minute internal characteristics/inclusions which are very difficult to observe when examined under 10x magnification.

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VS1 - Very Slightly Included 1

VS1 diamonds contain minor internal characteristics/inclusions which are difficult to observe when examined under 10x magnification.

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VS2 - very Slightly Included 2

VS2 diamonds contain minor internal characteristics/inclusions which are somewhat easy to observe under 10x magnification.

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SI1 - Slightly Included 1

SI1 diamonds contain noticeable internal characteristics/inclusions which are easy to observe when examined under 10x magnification.

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SI2 - Slightly Included 2

SI2 diamonds contain noticeable internal characteristics/inclusions which are very easy to observe when examined under 10x magnification.

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SI3 - Slightly Included 3

SI3 does not appear on the GIA clarity scale and is not officially recognized by the organization. However SI3 is used in the industry and appear on the Rap Sheet. This is a price list used by the retail industry. EGL or The European Gem Lab does recognize SI3 and is can be considered as a low-end SI2 or high-end I1.

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I1 - Included 1

I1/P1 diamonds contain internal characteristics/inclusions which are prominent when examined under 10x magnification. They are also visible face up to the unaided eye. Under certain circumstances, internal characteristics/inclusions may also be visible face up to the unaided eye in higher grades. These diamonds can also be calleD Piqué 1.

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I2 - Included 2

I2/P2 diamonds shall contain internal characteristics/inclusions which are very prominent when examined under 10x magnification. They are also easily visible face up to the unaided eye, slightly reducing the brilliancy of the diamond. These diamonds are also called Piqué 2.

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I3 - Included 3

I3/P3 diamonds contain internal characteristics/inclusions which are extremely prominent when examined under 10x magnification. They are also very easily visible face up to the unaided eye, reducing the brilliancy of the diamond. These diamonds are can also be called Piqué 3.

Colour

In the context of diamonds, colour is something the buyer does not want to see. The less visible the colour, the higher the value of the diamond; although the opposite is true for fancy-colour diamonds. The most common grading system used, is that of GIA. Using a colour-system ranging from the letter D (100% colourless) to the letter Z (near-colourless), this scale defines a well defined spectrum of all possible colours within a diamond. The difference between colours are often very subtle and usually not visible to the untrained eye. It will however have a significant impact on the pricing of the stone.

Although the most common grading system used is that of GIA, there are different organizations that also grade diamonds, such as: the American Gem Society (AGS) which uses the electric calorimeter, the International Diamond Council (IDC) and Scandinavian Diamond Nomenclature (Scan D.N). To be complete, we have also listed the different gradings systems as well.

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D - Colourless/ Exceptional White+

This is the highest color grade a diamond may recieve, the diamond is then 100% colorless. These diamonds are extremely rare and also heavily priced. An alternative name used for this colour is 'River' in Scan. D.N and has a value of 0-0,49 on the electronic calorimeter.

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E -Colourless/ Exceptional White

E colour diamonds are very bright and white. They display virtually no color. Its alternative name in Scan. D.N is also 'River' and has a value of 0,5-0,99 on the electronic calorimeter.

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F - Colourless/ Rare White+

These are exceptionally transparent and also very rare and highly priced. It is very difficult to find traces of color in E or F graded diamonds, especially to the untrained eye. In Scan. D.N. This color is called Top Wesselton and has a value of 1,00-1,49 on the electronic calorimeter.

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G - Near Colourless/ Rare White

Only when these diamonds are held next to a master stone of higher color grade, can a slight color be detected. Otherwise color is nealry indiscernible. Although these diamonds are still rare, they are slightly less expensive and are considered a good value. In Scan. D.N. G diamonds are called Top Wesselton and has a value of 1,5-1,99 on the electronic caloriemeter.

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H - Near Colourless/ White

H diamonds contains noticeable colour only when it is being compared to higher color diamonds. These diamonds are considered a good value. In Scan. D.N. These diamonds are called Wesselton and have a value of 2,0-2,49 on the electronic calorimeter.

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I-Near Colourless/ Slightly Tinted White+

Slight color in these diamonds are detectable. However, once the diamond is mounted, the color is unnoticeable to the untrained eye. The majority of these diamonds are used for engagement rings, earrings and pendants, due to it's good value. In Scan. D.N. they are called Top Crystal and have a value of 2,5-2,99 on the electronic calorimeter.

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J -Near Colourless/ Slightly Tinted White

J diamonds have a slightly noticeable color but still appears colourless to the untrained eye. In Scan. D.N. they are called Crystal and have a value of 3,0-3,49 on the electronic calorimeter.

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K -Faint yellow/ Tinted White+

K diamonds have a yellow tint that is more easily detected by the untrained eye. Due to its noticeable color, the price of a K diamond is often half the price of a G diamond. In Scan. D.N. the diamond is called Top Cape and has a value of 3,5-3,99 on the electronic calorimeter.

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L -Faint Yellow/ Tinted White

These diamonds have a yellow and thus noticeable color. A yellow god setting can compliment diamonds with a faint yellow color (J-M coloured diamonds). In Scan. D.N, the diamond is called top Cape and has a value of 4,0-4,49 on the electronic calorimeter.

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M -Faint Yellow/ Tinted Colour

Like all faint yellow diamonds, M diamonds have a faint, noticeable yellow color. In Scan. D.N, these diamonds are called Cape and have a value of 4,5-4,99 on the electronic calorimeter.

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N - Very Light Yellow / Tinted Colour

These diamonds have a yellow or brown tint that can be easily seen. Diamonds starting for the color N are not fit to be sold as gemstones, unless the customer asks specifically for a diamond with an amber color. These diamonds are much less expensive than diamonds of higher grade. In Scan. D.N these diamonds are called Light Yellow.

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O - Very Light Yellow/ Tinted Colour

These diamonds have a yellow or brown tint that can be easily seen. Diamonds starting for the color N are not fit to be sold as gemstones, unless the customer asks specifically for a diamond with an amber color. These diamonds are much less expensive than diamonds of higher grade. In Scan. D.N these diamonds are called Light Yellow.

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These diamonds have a yellow or brown tint that can be easily seen. Diamonds starting for the color N are not fit to be sold as gemstones, unless the customer asks specifically for a diamond with an amber color. These diamonds are much less expensive than diamonds of higher grade. In Scan. D.N these diamonds are called Light Yellow.

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Q - Very Light Yellow / Tinted Colour

These diamonds have a yellow or brown tint that can be easily seen. Diamonds starting for the color N are not fit to be sold as gemstones, unless the customer asks specifically for a diamond with an amber color. These diamonds are much less expensive than diamonds of higher grade. In Scan. D.N these diamonds are called Light Yellow.

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R - Very Light Yellow / Tinted Colour

These diamonds have a yellow or brown tint that can be easily seen. Diamonds starting for the color N are not fit to be sold as gemstones, unless the customer asks specifically for a diamond with an amber color. These diamonds are much less expensive than diamonds of higher grade. In Scan. D.N these diamonds are called Light Yellow.

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N-R - Very Light Yellow/ Tinted Colour

These diamonds have a yellow or brown tint that can be easily seen. Diamonds starting for the color N are not fit to be sold as gemstones, unless the customer asks specifically for a diamond with an amber color. These diamonds are much less expensive than diamonds of higher grade. In Scan. D.N these diamonds are called Light Yellow.

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S - Light Yellow to Yellow

S-Z diamonds have too much color for a white diamond. In Scan. D.N. they are called yellow.

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T - Light Yellow to Yellow

S-Z diamonds have too much color for a white diamond. In Scan. D.N. they are called yellow.

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U - Light Yellow to Yellow

S-Z diamonds have too much color for a white diamond. In Scan. D.N. they are called yellow.

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V - Light Yellow to Yellow

S-Z diamonds have too much color for a white diamond. In Scan. D.N. they are called yellow.

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W - Light Yellow to Yellow

S-Z diamonds have too much color for a white diamond. In Scan. D.N. they are called yellow.

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X - Light Yellow to Yellow

S-Z diamonds have too much color for a white diamond. In Scan. D.N. they are called yellow.

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Y - Light Yellow to Yellow

S-Z diamonds have too much color for a white diamond. In Scan. D.N. they are called yellow.

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Z - Light Yellow to Yellow

S-Z diamonds have too much color for a white diamond. In Scan. D.N. they are called yellow.

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S-Z - Light Yellow to Yellow

S-Z diamonds have too much color for a white diamond. In Scan. D.N. they are called yellow.

Cut

The exceptional brilliance and visual appeal of diamonds is, above all, the result of the cut: the relationship between the various components of a stone (the dimensions of and the angles between the facets), the symmetry of a stone and its polish. Cut should not be confused with the shape of a diamond (the silhouette seen from the top).

3 x Excellent

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Excellent

Tablesize between 54 and 62%, Crown height between 12 and 16%, Pavilion depth between 43 and 44.5%

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Very Good

Tablesize between 52 and 53% or between 63 and 66%, Crown height between 11 and 11.5% or between 16.5 and 18%, Pavilion depth between 41.5 and 42.5% or 45%

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Good

Tablesize between 50 and 51% and between 67 and 70%, Crown height between 9% and 10.5% or between 18.5 and 19.5%, Pavilion depth between 40 and 41% and between 45.5 and 46.5%

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Fair

Tablesize up to 49% and upward of 71%, Crown height up to 8.5% and upward of 20%, Pavilion depth up to 39.5% and upward of 47%

Poor

A poor cut grade is assigned when either polish or
symmetry is poor.

None means that the "cut" was not evaluated.

culet size

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medium

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none

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pointed

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very small

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small

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large

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very large