Diamond 4Cs

The 4Cs of diamonds are the essential criteria for evaluating their quality and value. 

Carat Weight

Cut refers to how well a diamond’s facets reflect light. The cut grading ranges from Excellent to Poor, with a good cut enhancing a diamond’s sparkle. A well-cut diamond is more brilliant and attractive.

Lab-grown diamond size comparison: 0.50, 1, and 1.5 carat options for sustainable luxury jewellery

Colour

Colour measures the absence of colour in a diamond, graded from D (colourless) to Z (light yellow). Colourless diamonds (D-F) are the most prized.

Diamond color grading chart from colourless D-F to yellow S-Z for lab-grown diamonds

Clarity

Clarity assesses internal inclusions and external blemishes, graded from Flawless to Included based on visibility under 10x magnification. Higher clarity means fewer imperfections and greater value.

Diamond clarity scale showing IF, VVS, VS, SI, and I grades with internal inclusions illustrated

Cut

Cut refers to how well a diamond’s facets reflect light. The cut grading ranges from Excellent to Poor, with a good cut enhancing a diamond’s sparkle. A well-cut diamond is more brilliant and attractive.

Excellent vs poor cut diamond comparison for lab-grown jewellery quality