Diamond Shape Diamonds come in a wonderful array of shapes. No one shape is better than another, so choose the shape that you like best.
Round cut Round diamonds are the most popular of all the shapes, perhaps because their circular proportions display the most "fire" and reflect more light back to the observer than any other shape. Round diamonds require that more rough be removed during cutting and polishing than with other shapes. The combined popularity of round diamonds and the significant weight loss during cutting are the two main contributing factors to the relatively higher price of these stones.
Radiant cut This is a modified or combination cut - a brilliant cut square or rectangle shaped diamond with clipped-off corners like the emerald cut. It melds the elegance of the emerald cut diamond with the brilliance and sparkle of the round diamond. Length to width ratio A radiant cut with a length to width ratio of less than or equal to 1.05:1 will appear square to the observer. While a squarer radiant-cut diamond is the preference of many, some people prefer a slightly rectangular diamond.
Moreover, the diamond saw allows diamonds to be salvaged from misshaped diamond rough. Sawing is a more expensive process than cleaving, as it requires about one-tenth of a carat of diamond dust (applied to the saw with oil) for every carat of sawed diamond. It is also a much slower process than the single-stroke process of cleaving. It may take days to saw through a two-carat diamond. Extant methods include the use of lasers to saw through diamonds.
Trilliant cut This is a brilliant-cut triangle diamond - a wedge shape with fiery brilliance. It can be a traditional triangular shape with pointed corners, or a more rounded triangular shape. Trilliants (also called Trillions) are often used as diamond accents in three stone rings and other jewelry settings, but may also be chosen to be set as solitaire diamonds. An equilateral triangle is prefered in a trilliant diamond. Variance in the ratio of length to width should not deviate considerably.
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