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Diamonds come in many shapes. Though it may seem to some there are only a set number of shapes, new shapes are constantly be devised by cutters and merchants alike. <h4>Popular Shapes</h4> <ul><li><b>Round Brilliant</b> - Accounts for over 80% of diamond sales (<a href="https://www.eightstar.com/Cut/es_cut4cs3.htm">source</a>), possibly because it reflects so much light.</li> <li><b>Princess</b> - The second most popular shape, is square and possesses nearly as much refractive properties as the round brilliant.</li> <li><b>Oval</b> - Described as an "elongated round" it also possesses the same kind of sparkle as a round brilliant. Popular in three stone anniversary rings.</li> <li><b>Emerald</b> - Is rectangular with its corners cut off. The emerald is one of the more traditional shapes, though not as popular as it once was.</li> <li><b>Marquise</b> - Another more traditional shape, best described as a "pointed oval". May suffer from the [[bow_tie_effect|Bow Tie effect]].</li> <li><b>Heart</b> - Possibly the least popular of all shapes. Though some people may want it for romantic or sentimental purposes.</li> <li><b>Radiant</b> - Similar to a princess cut, but with its corners cut off. Was popular before the princess grew in popularity.</li> <li><b>Pear</b> - Popular in pendants and shaped like a tear drop.</li></ul> <h4>Other Shapes</h4> Other shapes, including trilliant and baguette can be found <a href="https://www.diamondinfo.com/index.php/html/main/diamondshapes.html">here</a>. <h4>Effect On Pricing</h4> A diamond's shape has quite a significant effect on its pricing. <a href="https://www.polishedprices.com/methodology.shtml">Polished Prices</a> lists 10 diamond shapes and their effect on price. From this table, it can be seen that non-round brilliant cuts are usually priced between 60-80% of the price of an equivalent round brilliant. <h4>External Links</h4> <a href="https://www.diamondgrading.com/Shapes_Round.html">Shape Analysis</a> - includes common problems and ideal measurements for each shape.