What Determines the Quality of a Diamond? | BNT Diamonds

What determines the quality of a diamond?

The quality of diamonds is determined by the 4 C’s which describe each stone in great detail to outline its unique qualities and overall value. These descriptions are important to consider before choosing the right diamonds to invest in. .

What are the 4 C’s, and what do they stand for?

The 4 C’s stand for carat, colour, clarity, and cut. Let’s look at each in a bit more detail.


Carats refer to and determine the weight of a diamond. The larger the stone, the more carats it has. Similarly, as the carat weight increases, typically so does the price of that diamond.


Diamonds come in a variety of colours, including yellow, black, blue, brown, and more. But there is also a colour gradient for colourless diamonds, on a scale from D to Z (colourless to yellowish).


As each diamond is unique, most have individual impurities, called inclusions, which can disrupt the shine and sparkle of the stone. A clarity rating determines how brilliant the diamond is taking these impurities into account.


Diamonds can be cut into a range of shapes, including round, cushion, pear, princess, and more. But, experts can determine the quality of a diamond’s cut, which can further solidify that stone’s value.

When combined, these characteristics give an idea of the quality and value of a diamond. The 4 C’s are also used to identify stones because these descriptors outline each diamond’s unique characteristic.

Check out our article on the 4 C’s to find more information on these descriptors. Find the article here.

Want to learn more about diamonds for investment? The experts at BNT Diamonds can help. Get in touch with us today by booking an appointment in one of our showrooms or requesting a quote.