Diamond shape refers to the geometric outline or silhouette of the diamond. Choosing a diamond shape is important as it the easiest way to show off your distinct style and personality.
Shop by Diamond Shape
The Four Cs
Created by the Gemological Institute of America (GIA), the '4Cs of Diamond Quality' is the global standard for describing diamonds.
The 4Cs of diamonds are cut, colour, clarity, and carat weight. These are the four characteristics used to determine the quality of a diamond.
What Colours do we offer?
The GIA's colour scale ranges from D to Z, however we only offer "colourless" and "near colourless" diamonds (grades D to G) to avoid yellowing, browning, and general discolouration.
What is Diamond Clarity?
Each diamond is unique as it is naturally forged over thousands of years deep within the earth. Because of this diamonds often contain unique imperfections, either internal (inclusions) or external (blemishes).
A diamond's clarity is a measure of how few inclusions and blemishes it has. Each diamond is graded on a scale between Flawless and Included, with Flawless diamonds being so incredibly rare that most retailers don't offer them due to their very high prices. Robert Price jewellers offers diamonds between the grades of IF and SI1, more information is available on these below.
No inclusions and no blemishes visible under 10x magnification
No inclusions visible under 10x magnification
Very, Very Slightly Included
(VVS1 and VVS2)
Inclusions so slight they are difficult for a skilled grader to see under 10x magnification
Very Slightly Included
(VS1 and VS2)
Inclusions are observed with effort under 10x magnification, but can be characterized as minor
(SI1 and SI2)
Inclusions are noticeable under 10x magnification
(I1, I2 and I3)
Inclusions are obvious under 10x magnification which may affect transparency and brilliance
What is Diamond Carat Weight?
The weight of precious stones is measured in metric carats. Most diamonds used in fine jewellery weigh under one carat, with one carat being equal to 0.2 grams.
Confusingly, carat when referring to gold is a measure of the proportion of gold in an alloy, for example 18ct White Gold is 18/24 parts pure gold.
All Robert Price Jewellers diamonds are ethically sourced and conflict free, in compliance with the Kimberley Process.
All diamonds 0.25cts and above are also supplied with a GIA certificate. The GIA is the largest and most respected non-profit source of gemological knowledge in the world.