

Diamond Carat Weight
Carat is the special unit of measurement used to weigh diamonds and gemstones. Sometimes confused with the visual size of stones, it refers to weight only.
Diamond Education

Select the Perfect Diamond
Diamond Essentials and the 4 C's
This interactive walk-through will guide you through key facts and information about diamonds, and specifically how the 4 C's of any diamond will contribute to it sparkle and shine. Each section offers indepth reading, or a snippet of learning across each of these interactive sections. Use the arrows to guide your way through the DX Diamond Education pages.
Shape
What is Diamond Shape?
Choosing a diamond shape is crucial. While round diamonds remain popular, fancy shapes like oval, cushion, radiant, pear, heart and princess are gaining traction. At DX, we offer a wide range of shapes because we believe each ring should be as perfect as the love it symbolizes.
Discover the shape that reflects your individuality and union.










Carat
What is Carat Weight?
Carat refers to the unit of measurement which is used to weigh diamonds. Often, this is the most obvious visual element when we compare diamonds.
Carat is sometimes confused with the visual size of stones but it refers to weight only. The size does impact different stones’ measurements though.
Shapes and types of gemstones can also show slightly different readings due to variable densities.








Shown with 0.50CT round brilliant cut diamond
Shown with 0.75CT round brilliant cut diamond
Shown with 1.00CT round brilliant cut diamond
Shown with 1.25CT round brilliant cut diamond
Shown with 1.50CT round brilliant cut diamond
Shown with 2.00CT round brilliant cut diamond
Shown with 2.50CT round brilliant cut diamond
Shown with 3.00CT round brilliant cut diamond
Cut
What is Diamond Cut?
Cut describes the symmetry, balance, proportion and polish created by the diamond cutter, not the stone’s actual geometric shape. A diamond’s inherent beauty is determined directly by the expertise of its cut.
Stones cut the most skilfully will refract and reflect the most amount of light. Diamond cutters have a special understanding of the ways in which light penetrates and radiates through diamonds.
Cutters follow a special set of exact angles and proportions to maximise each diamond’s intrinsic brilliance and showcase its sparkle.






Diamonds which reflect only a little of the light entering them. Not carried by Diamond Exchange.
Diamonds which reflect some of the light entering them. Not carried by Diamond Exchange.
Diamonds which reflect most of the light entering them. Not carried by Diamond Exchange.
Reflecting almost as much light as the ideal cut, these diamonds are excellent quality at a cost significantly lower.
Diamonds which radiate almost all the light entering them.Finished with precision for maximum sparkle, they fall within the top 3% of quality determined by cut.
Diamonds which have perfect dimensions and proportions and emit optimal light. The cut to which the most rigorous standards are applied.
Clarity
What is Diamond Clarity?
The term ‘clarity’ is used in reference to a diamond’s purity and rarity. Minuscule characteristics can be trapped on or within a diamond when it is formed.
Gemmologists will examine these surface and internal characteristics under 10x magnification when assigning a grading to each stone. Diamonds with little or no inclusions are especially rare and valuable.








Inclusions are visible under 10x magnification and may be visible to the naked eye. More inclusions than SI1.
Inclusions are visible under 10x magnification, but are generally not visible to the naked eye.
Slightly more inclusions than VS1, difficult to see under 10x magnification and typically cannot be seen with the naked eye.
Inclusions cannot be seen with the naked eye and are difficult to see under 10x magnification.
Slightly more inclusions than VVS1, but still very difficult to see under 10x magnification even for expert gemologists.
Miniscule inclusions are very difficult to see under 10x magnification, even for expert gemologists.
Extremely rare and valuable, these diamonds have no internal flaws but may have minute surface blemishes visible under 10x magnification.
Extremely rare and valuable, flawless diamonds have no internal or external flaws. Less than 1% of all diamonds are FL clarity.
Colour
What is Diamond Colour?
Colour, graded by GIA standards, indicates the natural hue or lack thereof in a diamond. DX exclusively offers colourless and near-colourless diamonds for their rarity. While colour variations don't necessarily affect value or quality, those with minimal colour are highly sought after.
Traces of elements during formation result in hues like yellow, grey, or brown. Gemstone colour is assessed by hue, tone, and saturation: hue is the primary colour impression, tone is its lightness or darkness, and saturation is its purity and intensity.







Colour can be detected, but offers good value.
Colour can be slightly detected, but offers good value.
Colour is only slightly noticeable when compared to diamonds of better grades, but offers excellent value.
Colour is only slightly noticeable when compared to diamonds of better grades, but offers excellent value.
Slight colour can be detected by an expert gemmologist, but still considered “colourless”. A high-quality diamond.
Only minute traces of colour can be detected by an expert gemmologist. A rare, high quality diamond.
The highest colour grade which is extremely rare and the most valuable.
WHAT IS CARAT WEIGHT?
Sometimes confused with the visual size of stones, it refers to weight only. The special unit of measurement used to weigh diamonds and gemstones is called ‘carat’. Sometimes confused with the visual size of stones, it refers to weight only. The size does impact different stones’ measurements though. Shapes and types of gemstones can show slightly different readings due to variable densities. For instance, a 1.00 carat round sapphire might measure 6.0 mm, yet a 1.00 carat round diamond will measure 6.5mm. T.C.W. stands for ‘Total Carat Weight’, describing the weight of all gemstones or diamonds in a jewellery item - when there are more than one - in total. Earrings featuring diamond solitaires, for instance, are commonly cited in T.C.W. – the combined weight of both stones being indicated.
Approximate Carat Weight Size
The relationship between diamonds according to their size and increasing carats is shown in this diagram. These measurements are typical, however each diamond is unique.









HOW DOES CARAT WEIGHT AFFECT PRICE?
Tailoring diamond carat weight to fit various budgets is achievable through considerations of cut, color, and clarity. Larger diamonds, being rarer, hold higher value than smaller ones, with prices escalating exponentially with carat size. A 1.00 carat diamond typically surpasses the value of two 0.50 carat diamonds of equal quality. Generally, doubling the weight quadruples the price. Diamonds just below standard weights, known as 'under-sizes,' offer exceptional value due to their rarity. While compromising attractiveness for standard weight isn't common, cut-off weights like 0.50ct, 0.75ct, 1.00ct, 1.50ct, and 2.00ct, known as 'magic numbers' in the industry, are pivotal considerations.
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