The 4C's of Diamonds

The 4C's of Diamonds

Until the middle of the 20th century, there was no accepted benchmark for judging diamonds. Established in the 1940s, the GIA's 4Cs system evaluates the gems by Cut, Clarity, Color and Carat Weight. At THE RAYY, we add an additional criteria: Consciousness


A stone's cut determines how its facets will interact with the light. It is the cut that creates a diamond's legendary sparkle.


An individual stone may contain certain internal characteristics, called "inclusions", and external ones known as "blemishes". A diamond's clarity is a measure of their absence.


A stone's color grading is actually based on the absence of color. A chemically-pure and structurally-perfect diamond has no hue, like a drop of pure water.


Carat Weight determines how much a diamond weighs, and thus its size. One carat is defined as 200 milligrams.

Sustainability is a founding principle of THE RAYY. Thus, we have added one extra criteria to choose our diamonds:


Consciousness means assessing a stone's environmental impact. To reduce the effects of mining and preserve limited resources, we use only sustainable, lab-grown diamonds.

Discover our diamond collection