COLOUR

The colour of a diamond is the degree of its colourlessness, the less hue possesses the stone – the better it is perceived by the viewer, the more expensive it is valued.

Polished diamonds – from colourless to yellowish or yellowish brown – are grouped into categories briefly described below. Well-trained professionals perform the colour grading procedure – by way of comparing a specific diamond to master stones.

Fancy coloured diamonds (blue, red, pink, and others) are very rarely found, and require an entirely different grading system – from Faint and Very Light to Fancy Deep and Fancy Vivid. Higher grade fancy diamonds have a greater monetary value.

At Kristall a unique and proprietary patented system of diamond grading is employed. It’s corresponding to the GIA’s standards is shown below:

  0.30 cts. and up Description
Kristall's
Standard
GIA
1 D Top colourless
2 E Colourless
3 F With slightly visible yellowish, greenisch hue
3-1 With slightly visible brownish, grey hue
4 G With minor yellowish, greenisch hue
4-1 With minor brownish, grey hue
5 H With little yellowish, greenisch hue
5-1 With little brownish, grey hue
6 I With visible yellow, green hue
6-1 With visible brownish, grey hue
7 J With clearly visible yellow, green, lemony hue
7-1 With clearly visible brownish, grey hue
8-1 K Very faintly coloured yellows, includig those with minor green, lemony hue
8-1-1 Very faintly coloured greys or browns
8-2 L Faintly coloured yellows, includig those with minor green, lemony hue
8-2-1 Faintly coloured greys or brown
8-3 M Lightly coloured yellows, includig those with minor green, lemony hue
8-3-1 Lightly coloured greys or browns
8-4 N Light yellows, includig those with minor green, lemony hue
8-4-1 Greys or browns
8-5 O Yellows, includig those with minor green, lemony hue
8-5-1 Dark greys, browns, blacks

 

  0.29 cts. and less Description
Kristall's
Standard
GIA

1 D Top colourless
E Colourless

2 F With slightly visible yellowish, greenish,
brownish, grey hue
G With minor yellowish, greenish hue

3 H With little yellowish, greenish hue
I With visible yellow, green hue

4 J With clearly visible yellow, green, lemony hue
K Very faintly coloured yellows, including those with minor
green, lemony hue

5 L Faintly coloured yellows, including those with minor
green, lemony hue
M Lightly coloured yellows, including those with minor
green, lemony hue

6 N Light yellows, including those with minor green,
lemony hue
O Yellows, including those with minor green, lemony hue



7 G With minor brownish, grey hue
H With little brownish, grey hue
I With visible brownish, grey hue
J With clearly visible brownish, grey hue


8 K Very faintly coloured greys or browns
L Faintly coloured greys or browns
M Lightly coloured greys or browns

9 N Greys or browns
O Dark greys, browns, blacks

KRISTALL PRODUCTION CORPORATION

2 Shkadov Street, Smolensk, 214031, Russian Federation  

Tel.: +7 4812 20 01 00 / Fax: +7 4812 20 70 00

kristall@kristallsmolensk.com

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