Information about the relation between the weight and the diameter of a diamond
Carat
mm (Approx.)
0,30 Ct
4,30 mm
0,40 Ct
4,60 mm
0,50 Ct
5,00 mm
0,70 Ct
5,70 mm
1,00 Ct
6,30 mm
1,25 Ct
6,90 mm
1,50 Ct
7,30 mm
Equivalence for round brilliant diamonds
Examples of different diamond measures





0,30 Ct
0,50 Ct
0,80 Ct
1,00 Ct
1,50 Ct
« 0.30 Carat » diamond
White degree from D to Z

D-EExceptional white
F-GExtra white
HWhite
I-JSlightly tinted
K-MTinted white
N-ZVery tinted
« F » Colour diamond
Fluorescence is a luminous effect that some diamonds exhibit when exposed to ultraviolet light. They show visible light, usually blue.
None or Nil
Absence of fluorescence
Very Slight
Very little fluorescence
Slight or Faint
Little fluorescence
Medium
Medium fluorescence
Strong
Strong fluorescence
Very Strong
Very strong fluorescence
Our recommandation
Since fluorescence may in some cases give a milky diamond appearance, prefer a diamond without fluorescence ("None" or "Nil")

« none » Fluorescence diamond

Cut Grade | Excellent | Very Good | Good | Fair | Poor |
Polish Grade | Excellent | Very Good | Good | Fair | Poor |
Symmetry Grade | Excellent | Very Good | Good | Fair | Poor |
« EX » Cut diamond

IF

VVS 1
VVS 2

VS 1
VS 2

SI 1
SI 2

P1
P2
P3
IFPure
VVSVery very small inclusion(s)
VSVery small inclusion(s)
SISmall inclusion(s)
PIncluded
« Si1 » Clarity diamond
The three major diamond certification laboratories HRD, IGI and GIA offer the option of laser engraving the certificate number on the girdle (circumference) of the diamond. This is a proof of the good match of the diamond and its certificate. The inscription is very small (to preserve the purity of the stone) and very difficult to read with the magnifying glass 10X. If you order only the diamond (without the jewel), it will be delivered under seal in a rigid plastic pouch (see photo below) for diamonds certified by HRD or by IGI. For GIA diamonds, the seal must be specifically requested in the comments field during the ordering process.

Round Diamond 0.30 Carat Ref. 394284
Carat
i0.30 Ct
Colour
iF
Clarity
iSi1
Shape
Round brilliant
Cut
iEX
Fluorescence
inone

The name and certificate number are engraved on all our certified diamonds i
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