The brilliance and fire of a round diamond

Diamonds are precious stones that can be found in thousands and thousands of jewellery items throughout the world. Mined from the depth of the earth from the volcanic kimberlite pipes that bring them further to surface, they appear in a variety of different natural colours. All rough diamonds are shaped into a number of different cuts, depending on what look the designer or customer is after. The cut of the diamond will determine the way that the light is reflected and refracted through the facets that are present as a result of the cut. Professional diamond cutter spend years developing their skills and technique in this incredibly important part of jewellery creation.

Round diamonds are amongst the most common shaped diamond to find in jewellery items such as the Part set Diamond Wedding Rings you can see at They are thought to make up around 75% of all the diamonds sold within the jewellery industry. One of the reasons for their popularity is that it is one of the cuts that allow for the brilliance and natural sparkle of the diamond to radiate throughout all 58 facets. It is this popularity and demand that is one of the main reasons that although it is a common cut to find in jewellery it is actually one of the most expensive. The other factor in the pricing is that when round diamonds are cut from the originally mined rough diamond there is a lot of wastage, this pushes the price of each carat up.

These round cut diamonds are thought to have originated back in the latter half of the 17th Century. These early versions were named after the Cardinal Mazarin who was the designer of this type of diamond cut. These Mazarin diamonds remained popular well into the 18th Century when further advancements led to the ‘Old European Cuts’ of the 1700s.

It is thought that the release of Marcel Tolkowsky’s thesis in 1919 called “Diamond Design: A Study of the Reflection and Refraction of Light in Diamond” was one of the main reasons for the modern surge popularity of these round diamonds. The thesis looked at the perfection proportions for a round cut diamond and the impact that this had on the brilliance and fire of the final jewel. Over time these technical specifications have been tweaked and advanced to further improve the round diamond cut.