A diamond's cut is arguably the most critical factor to consider when buying a diamond. Why? It's because the cut contributes sharply in giving the diamond its sparkle. If a diamond is cut too shallow or too deep, it can lose its play on light.

Always refer to the lack of the diamond's colour when grading its whiteness. The highest quality diamonds are colourless, which can be graded from a scale of D to Z. D represents a colourless diamond and Z refers to a light yellow or brown colour.

A diamond's clarity refers to imperfections found on the surface or internally. Internal flaws are called inclusions, while external imperfections are referred to as blemishes. The majority of diamonds, both mined and lab-grown, feature inclusions and blemishes on a microscopic scale, which is why even diamonds with the highest clarity grade feature slight inclusions. The minor inclusions featured in our diamonds are entirely invisible to the naked eye.

A Carat refers to a diamond's weight and gives you a sense of its size. The unit of weight for diamonds is the metric carat, which is one-fifth of a gram and is divided into 100 points. A bigger diamond doesn't always mean a more expensive one — you have to consider all the 4 Cs. Here's a tip: When you compare diamond carat sizes, consider a diamond's cut. A high-carat diamond with a poor cut grade can look smaller, often featuring a deeper cut. On the other hand, a diamond with a smaller carat and a sharper cut is always preferable.