Four C’S

The Four Cs of Diamonds: A Guide to Understanding Diamond Quality

When shopping for a diamond, it is important to consider the Four Cs: carat weight, cut, colour, and clarity; These four factors determine the overall quality and value of a diamond. Understanding each of the Four Cs will help you make an informed decision and ensure that you are getting the best quality diamond for your money.

Carat: Carat refers to the weight of a diamond and is a measure of its size. One carat is equal to 0.2 grams, or 200 milligrams. The carat weight of a diamond affects its price, with larger diamonds typically being more valuable. However, other factors such as colour, clarity, and cut can also have a significant impact on a diamond’s overall value.

Diamond Carat
Diamond Prices

Colour: Colour is a measure of the presence of any hue other than pure white in a diamond. The Gemmological Institute of America (GIA) uses a scale from D (no hue) to Z (yellow or brown hue) to grade a diamond’s colour. A diamond with no hue is rare and more valuable, while a diamond with a yellow or brown hue is less valuable. The GIA recommends that diamonds with a grade of D to F (no hue to a slight hue) be considered for engagement rings because they have the best colour appearance.

Clarity: Clarity is a measure of the number and size of inclusions (internal imperfections) and blemishes (external imperfections) in a diamond. The GIA uses a 6-point scale to grade clarity, from Flawless (no inclusions or blemishes visible under 10x magnification) to Included (inclusions and blemishes visible to the naked eye). The higher the clarity grade, the more rare and valuable the diamond is.

Cut: The cut of a diamond refers to how well the diamond has been cut and shaped, which affects its brightness, fire (the display of rainbow colours), and overall appearance. The GIA uses a 5-point scale to grade cut, from Excellent to Poor. A well-cut diamond will reflect light in a way that enhances its beauty and is more valuable. The cut of a diamond is often considered the most important of the Four Cs because it has the biggest impact on the diamond’s overall beauty.

Diamond Fluorescence: Diamond fluorescence is the phenomenon where a diamond emits a blue glow when exposed to ultraviolet light. Fluorescence can have a positive or negative effect on a diamond’s appearance, depending on the strength and quality of the fluorescence. A diamond with strong blue fluorescence can appear hazy or milky in sunlight and is generally considered less valuable. However, diamonds with faint or medium blue fluorescence can enhance a diamond’s appearance and may not affect its value. 

In the quest for the perfect diamond, remember the pivotal Four Cs: Carat Weight, Cut, Colour, and Clarity. These elements dictate not just the diamond’s dazzle but its value as well. Mastering this quartet empowers you to make a discerning choice, ensuring that every penny spent is a step towards unmatched quality. Keep an eye out for the lesser-known but impactful factor of Diamond Fluorescence too. Choose wisely; after all, diamonds are forever.

Diamond Fluorescence
Diamond Fluorescence