Factors important in selecting a fancy shaped diamond include all of the 4C's as they apply to the round shape. However, additional considerations come into play when considering fancy shapes such as the overall appearance of the outline of the girdle of the stone, the "bow tie" effect and the length-to-width ratio. Finally, one may ask, how does shape affect price? So here we will consider each shape separately and the factors which are important in how they impact beauty and price.
Currently there is no widely accepted "ideal" range of proportions for the fancy shaped diamonds. However, these may be developed in the future because it is known that the American Gem Society is working on this issue (see www.gemappraisers.com for details. This is probably the best classification of cut proportions in fancy shapes currently available
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