The most critical factor of lab-grown and recycled-antique diamond quality, the cut, describes how a diamond’s facets play with light. A diamond that disperses light poorly will appear dull and lifeless, even if it has excellent colour, clarity and carat. Cut is the only one of the 4 C’s that the human hand is responsible for. The process must achieve perfect precision of cut, symmetry and polish to emphasise a diamond’s sparkle.
Cut Grade Determinants
We select diamonds with an excellent rating in precision of cut, symmetry, and polish. Our diamonds will exude fire and brilliance.
Precision of cut
A diamond’s proportions must maximise light reflection so that all of the light that enters it is reflected from its crown.
The facets on any side of a diamond should aim to match those across its axis.
The final step of the cutting process ensures that a diamond is free from surface blemishes that prevent the reflection of light.
Types of Diamond Cut
The most popular choice of faceting style, a brilliant cut displays triangular and kite-shaped facets that maximise brilliance. Round, cushion, oval, marquise, pear and heart-shaped diamonds all utilise the brilliant cut.
Featuring trapezoidal facets aligned parallel to the diamond’s girdle, this faceting style accentuates a diamond’s colour and clarity. The emerald cut is the most common step cut.
Rose-cuts, recognised by their flat bottom and domed top, date back to the 16th century and have a vintage and romantic appeal.
White diamonds come with varying degrees of colour. The spectrum ranges from extremely rare colourless diamonds to yellow-tinted warm white diamonds. A diamond’s colour is caused by trace elements of nitrogen that were present when the diamond was formed.
A colour grade chart (23-shades used throughout the industry) helps to determine the diamond's colour, and it is assigned a letter from D (colourless) to Z (light yellow). D colour diamonds are the most highly prized because of their rarity.
Colour is less relevant to lab-grown diamonds because they are grown in controlled conditions.
How Important is Diamond Colour?
Since colour grade considerably alters a diamond’s look, colour is the second most significant of the 4 C’s.
Diamond Colour Scale
VERY LIGHT YELLOW
Carat signifies the weight of a diamond, not its size. Whilst one diamond may have a higher carat than another, it does not imply that it will look bigger to the eye. Rather, its size is influenced by the shape and depth of the diamond cut. When we talk about carat weight, we do so to the hundredth decimal place to maximise precision (0.75cts). One diamond carat equals 200 milligrams.
Is a higher carat weight superior?
Carat weight alone does not equate to a diamond’s value. That said, a diamond's value is calculated on a per-carat basis. The 4 C’s must be collectively taken into consideration to decide its value.
Diamond Carat Weight Estimations
4 x 3.5mm
5 x 4.5mm
6 x 5mm
6.5 x 5.5mm
7.5 x 6.5mm
8 x 7mm
9 x 8mm
10 x 8.5mm
10.5 x 9mm
Clarity grade identifies the number of inclusions (internal flaws) and blemishes (external imperfections) in a diamond. A diamond may contain traces of minerals and uncrystallised carbon, appearing as inclusions, because of its organic formation deep within the earth under extreme heat and pressure. The fewer inclusions and blemishes a diamond contains, the higher its clarity grade.
Clarity is less relevant to lab-grown diamonds because they are grown in controlled conditions, therefore they do not have many inclusion such as are common in mined diamonds. We offer VVS or VS only (see chart below).
VVS1 & VVS2
VS1 & VS2
S1 & S2
I1, I2, I3
How Important is Diamond Clarity?
Diamond clarity influences the way light reflects and refracts, therefore the presence of inclusions and blemishes will result in a diamond with less sparkle. A good clarity grade is critical for brilliance and fire.
Diamond Clarity Chart
The chart distinguishes 6 different categories of diamond clarity elicited under 10-power magnification:
VVS1 & VVS2
VS1 & VS2
S1 & S2
I1, I2, I3
The shape encompasses the geometric outline and overall physical form of a diamond. Every diamond shape has its own attributes and cut specifications, which also play a large factor in the overall look of the stone.
What is a diamond?
Which C is the most important?
How do I care for my diamond?
1. Place a couple of drops of washing up liquid in a bowl of warm water.
2. Dip both your ethical engagement ring and toothbrush in the bowl and then begin to scrub (for any stubborn dirt then leave to soak for up to 15 minutes).
3. Don’t forget to scrub the inside too.
4. Rinse in warm water.
5. Leave on a paper towel to dry.
How can I learn about the provenance of my sustainable diamond?