The four C’s of diamonds

Learn about diamond characteristics to maximise the beauty and brilliance of your diamonds

CUT

When selecting a diamond, your first priority is usually to choose a cut. The cut of a diamond not only refers to the diamond’s shape, but also to how effectiely the diamond returns light back to the viewer’s eye. Learn about round brilliant diamonds and fancy shaped diamonds such as princess, emerald, and oval cut diamonds.

diamond anatomy

The cut of a diamond is the factor that fuels a diamond’s fire, sparkle and brilliance. Precise workmanship Is required to cut a diamond so its proportions, symmetry, and polish maximise its beauty. The allure of a particular diamond depends more on cut than anything else. The quality of cut is crucial to the diamond’s value.

diamond shallow cut
diamond ideal cut
diamond deep cut

Carat cut

EXCELLENT
VERY GOOD
GOOD
FAIR
POOR

Diamond shapes

diamond  round
diamond  princess
diamond  emerald
diamond  oval
diamond  baguette
diamond  pear
diamond  marquise
diamond  heart
diamond radient
diamond  cushion
diamond  trilliant

CARAT

CARAT

Carat is the measurement of how much a diamond weighs. A metric ‘carat’ is defined as 200 milligrams. All else being equal, diamond price increases with carat weight, because larger diamonds are more rare and more desirable. However, two diamonds of equal carat weight can have very different values (and price) depending on three other factors of the 4cs: Colour, clarity and cut.

Carat weight

Round
0.25
4.1mm
size 0.25
4.1mm
0.5
5.1mm
size 0.5
5.1mm
0.75
5.8mm
size 0.75
5.8mm
1
6.4mm
size 1
6.4mm
1.5
7.4mm
size 1.5
7.4mm
2
8.1mm
size 2
8.1mm
3
9.3mm
size 3
9.3mm
4
10.2mm
size 4
10.2mm
5
11mm
size 5
11mm

CLARITY

CLARITY

Clarity refers to the presence of inclusions in a diamond. Practically all diamonds contain naturally occurring internal inclusions. Inclusions are natural identifying characteristics such as minerals or fractures, appearing while diamonds are formed deep beneath the earth’s crust. The size, nature, location and amount of inclusions determine a diamond’s clarity grade and affect its cost. One unique advantage of the ideal cut is that its sparkle can mask otherwise noticeable inclusions.

Clarity Guide

diamond clarity VVS2
diamond clarity VS2
diamond clarity SI2
diamond clarity I2

Clarity scale

flawless
INTERNALLY FLAWLESS
VVS1 VERY VERY SLIGHTLY INCLUDED
VVS2 VERY VERY SLIGHTLY INCLUDED
VS1 VERY SLIGHTLY INCLUDED
VS2 VERY SLIGHTLY INCLUDED
SI1 SLIGHTLY INCLUDED
SI2 SLIGHTLY INCLUDED
I1 INCLUDED
I2 INCLUDED
I3 INCLUDED
 

Our diamond’s are all gia certified. The GIA clarity scale contains 11 grades, with most diamonds falling in the vs (very slightly included) or si (slightly included) categories.


COLOUR

COLOUR

Colour refers to the natural body colour of a diamond and not to the reflection of spectral colours that flash when a diamond moves. Most diamonds naturally exhibit slight hints of yellow, brown, or grey. This colour is caused by natural trace elements of nitrogen that were present when the diamond formed under the earth’s crust. The less colour a diamond exhibits, the higher the rarity, and therefore the higher the value. After cut, colour is the next most important characteristic to consider when choosing a diamond.

Colour guide

Diamonds come in all the colours of the spectrum
COLOURLESS
colour D
COLOURLESS
colour E
COLOURLESS
colour F
NEAR COLOURLESS
colour G
NEAR COLOURLESS
colour H
NEAR COLOURLESS LIGTHLY TINTED
colour I
NEAR COLOURLESS LIGTHLY TINTED
colour J
FAINT YELLOW
colour K-M
VERY LIGHT YELLOW
colour N-R
LIGHT YELLOW
colour S-Z
YELLOW
colour FANCY
 
 
 
 
 
 
 

The classification of body colour of a diamond extends from d (colourless) to z (light yellow). Colour grades are determined by comparing each diamond to a master set. Each letter grade represents a range of colour and is a measure of how noticeable a colour is.