Diamond Guide - Cut
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The way in which a diamond is cut determines how brilliant the diamond will be.
A well cut diamond reflects the maximum amount of light that enters it.
The exact angles of the ideal cut diamond have been mathematically calculated
and proven to reflect the maximum amount of light.
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Poorly Cut Diamond
 Most diamonds that are cut for the general market are cut in a way that will maximize carat weight, not beauty.
The shape of the rough diamond determines the cut. Consequently, many diamonds are cut either too deep or too shallow.
A diamond that is cut too deep or too shallow will allow light to pass through the bottom of the stone.
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The Ideal Cut
 The Ideal Cut diamond is a diamond that has been cut to exact mathematically proven proportions
with the goal of producing the most beautiful diamond possible. Maximizing light return, rather
than carat weight, is the highest priority for a master cutter striving for the Ideal Cut. Consequently,
a cutter must sacrifice weight in order to achieve the Ideal Cut.
Hearts and Arrows Super Ideal Cut diamonds are the top ideal cut diamonds.
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The STAR 129 Diamond
The STAR 129 is a new round cut that has been developed using modern technology. Unlike the traditional 58 facet round brilliant diamond, a STAR 129 has 129 facets. Like the Ideal Cut, the STAR 129 diamond is cut to maximize brilliance. We have seen several new cuts over the years, but no cut has been able to outshine the Hearts and Arrows Ideal Cut. The STAR 129 was the first cut that could compete with the Hearts and Arrows when it comes to brilliance and overall beauty.
Learn more about the STAR 129 diamond.
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The Round Brilliant Cut has the highest potential for brilliance. The brilliance of a Marquise, Oval,
or Pear shaped diamond can be quite good if it is well cut. However, they usually have
a bow-tie shaped dark area in the center of the diamond.
Emerald Cut diamonds are often poorly cut, but when they are well cut, especially in larger sizes (over 2 ct.),
they can be quite impressive. At their best, they display large rolling flashes of color across the
face of the stone, which you do not find in cutting styles with small facets.
Baguette diamonds are like Emerald Cut diamonds without the cut corners.
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