ROUND BRILLIANT CUT
The round brilliant cut is conventionally the most popular shape of all diamond cuts and has set the standard. Polished with 57 facets its ideal proportions return a great amount of fire, brilliance and scintillation. This cut has also been the benchmark for theories of light behavior and precise mathematical calculations, all in the pursuit of perfection.
Square in shape and with pointed corners, the princess cut is the most popular shape of the fancy cut diamonds. Its beautiful brilliance and square shape makes it a favorite for engagement rings. Princess Cut diamonds are generally polished with either 50 facets or 58 facets, depending on how the pavilion is cut.
The Princess Cut, technically known as a ‘Square Modified Brilliant Cut’, is a square version of the Round Brilliant Cut with numerous sparkling facets. The optimal ratio of length to width is 1:1, although a length-to-width ratio between 1:1 and 1.4:1 is perfectly acceptable.
The Emerald cut is an elegant diamond shape characterized by its step-like facets, rectangular shape and trimmed corners. Due to its larger, open table, this shape is often reserved for top color and clarity diamonds. The Emerald cut is typically polished with 44 facets. Generally, the optimum length-to-width ratio for an emerald cut diamond should be 1.35-1.65:1, although 1.25:1 to 1.75:1 is also considered to be acceptable.
An oval diamond is an elongated version of the round brilliant. If well proportioned, this beautiful cut gives great brilliance, fire and scintillation. Oval diamonds are also very popular as their length can accentuate long, slender fingers. Oval cut diamonds are generally polished with 56 facets.
The Oval shape has a larger surface area, than a round brilliant of the same carat weight, and is an excellent choice for those more concerned with size. The ideal length-to-width ratio is 1.5:1, but a range from 1.33:1 to 1.66:1 is widely acceptable.
The Pear shape is a unique hybrid cut, shaped like a tear drop and combining the best of the marquise and round brilliant cut. Well proportioned, it gives a depth of scintillation to the point of the diamond. Pear shapes are extremely popular in rings, earrings and pendants. Pear shapes are typically polished with 58 facets, and the optimal length-to-width ratio is between 1.50 and 1.75:1.
The shape of the Cushion cut is characterized by soft edges and round corners, resembling a cushion or pillow. This type of cut has been popular since the first diamond cuts were developed. Cushion cut diamonds range from a more square shape to rectangular.
If you prefer the squarer shape, look for a length-to-width ratio of 1.05 to 1.10:1. For a more rectangular shape, look for length-to-width ratios of greater than 1.15:1.