It may surprise you to know that two separate diamonds which are equal in weight, proportion and clarity may vary significantly in price, on the same date, with an equal grading report date and the same mark up date. But, this may still be so.

If you visit a jewellers shop or search for diamond rings or loose diamonds online, you will soon find that no two equal diamonds will cost the same price. Sometimes they do not even remotely resemble each other in value. This is because, in fact, no two diamonds are ever completely equal, no matter how it may seem on the surface. For instance, some will have inclusions situated in the centre of a diamond making it less desirable than an equal diamond which has inclusions around the perimeter.

Colour typing is not a very well known aspect of diamond grading outside of the diamond industry, but is well used within. In 1999, a gem colour grading system was born. This method is so precise that it can break down the colour grades into five separate colour types. The colour type is then added to the diamond grade meaning that it is almost impossible for two diamonds to be completely equal, thus affecting the value of each.