Diamond Glossary

Radiant Cut - See Shape.

This cropped corner square cut diamond rose in popularity during the 1980’s. With high sparkle and brilliance, the radiant cut was created in 1977 by Henry Grossbard while trying to combine the brilliance of the round diamond with the elegance of the emerald cut.

With 70 facets and carefully cropped and bevelled corners, the radiant cut is a sturdy shape. Unlike other square shaped stones, such as the princess cut, radiant diamonds are not susceptible to damage and breakage. This makes the radiant cut a fantastic choice for those looking to pursue an active lifestyle.

Longer, more rectangular radiant cut stones are prone to bowties.

Rough Diamond - a diamond that has not been cut and polished.

Rough diamonds look very different to cut and polished stones. While cut and polished diamonds are clear, shiny and shaped, rough diamonds are shapeless and not transparent.

Diamond cutting requires specialist diamond knowledge, skills and tools.As the hardest material in the world, the only way to cut a diamond is with another diamond. The process has evolved extensively over the years, with the introduction of high tech machinery and equipment. There are five stages to cutting and polishing a diamond: planning, cleaving, bruting, polishing and finally inspecting.

During the planning stage, the diamond cutter will establish the best way to cut a diamond in order to minimize waste and retain as much weight as possible. Then the cutter will split the rough stone into multiple pieces. The bruting stage involves shaping the stone, followed by the polishing stage whereby the facets are created. Finally, the stone is inspected to check that it meets the requirements.

Round Brilliant Cut - See Shape.

By far the most popular shape for diamonds, the brilliant round cut is designed to optimize light and create maximum sparkle. However, their popularity along with the cutting process that results in losing a large amount of carat weight, does translate to higher prices than other cuts.

in 1919, Marcel Tolkowsky published “Diamond Design: A Study of the Reflection and Refraction of Light in Diamond” that outlined the specific angles and proportions that would make the best use of light.