4 C's of Diamond

The 4 C's of Diamond

To simplify the subject of diamond grading, the 4 Cs relate to Cut, Colour, Clarity and Carat weight — a universal language established by the Gemological Institute of America (GIA) and introduced to the public. The combination of these factors determines a diamond's relative rarity and value.

However, as important as the 4 Cs are in diamond grading reports, they do not express the beauty of a diamond — the most important part of our diamond selection work at ASA Jewels. By hand and eye, we focus on the beauty of each and every diamond, because a diamond should never be purchased purely on its laboratory grading report. Two diamonds with the same 4 Cs may differ greatly in beauty.

One may be dull and lifeless, the product of poorly aligned facets and angles, while the other may radiate with Fire, Life and Brilliance.

At ASA Jewels, we know their interrelation very well, and we can help you find the perfect diamond for every budget. And most importantly, trust your eye, mind and ultimately your heart's reaction — the diamond you choose should be the one you do not want to take off your hand, regardless of the 4 Cs.

Cut

The cut of a diamond refers to how well its facets interact with light. A well-cut diamond will reflect light beautifully, creating the sparkle and brilliance that diamonds are known for. Cut also refers to the shape — round, oval, cushion, emerald, pear, and more.

Colour

Colour refers to the natural tint inherent in white diamonds. The GIA grades diamond colour on a scale from D (colourless) to Z (light yellow or brown). The less colour a diamond has, the higher its grade and value.

Clarity

Clarity is a measure of the purity and rarity of the stone, graded by the visibility of inclusions and blemishes. A flawless diamond has no inclusions or blemishes visible under 10x magnification.

Carat

Carat denotes the weight of the diamond. One carat equals 0.2 grams. Larger diamonds are rarer and therefore more valuable, though carat weight alone does not determine a diamond's quality or beauty.