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Diamond Education

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.

ShapeCut Colour Clarity Carat

Diamond Education

The 4C's And Your Diamond

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.

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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