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The Importance Of Diamond Cuts

Posted by on Jul 1, 2016 in All jewellery, Diamond Cuts | Comments Off on The Importance Of Diamond Cuts

Many people think of a diamond’s cut and believe it has to do with a shape. It’s only natural to believe that’s what jewelers are talking about. You associate a “princess cut” with a rectangular shape, you associate a “round” cut with a round shape, and you associate an “pear cut” with a pear shape. While it makes perfect sense to you why you believe the “cut” deals with the diamond’s shape, jewelers are actually referring to a diamond’s proportions. By “proportions” we mean the diamond’s depth, width, and uniformity of facets. So, while you may think that a cut is importance because you have your heart set on a particular shape of a diamond, jewelers have a different reason to acknowledge the importance of a diamond’s cut. The cut is what controls the brilliance and durability of the diamond.

The “brilliance” of a diamond is the beautiful sparkle and shine it produces when light hits the stone. Without a good cut, your stone can lack brilliance. It does not matter how large the diamond is, what color the stone is, or what clarity the stone has. If the cut is bad, your sparkle is hindered. Here are some ways that the cut can directly affect certain characteristics you should be looking for in a quality diamond.


proportions-ideal-cutShallow cut stones lose their light out of the bottom of the stone. The light goes in the stone and does not bounce back out the top. This can make the diamond appear dull. Deep cut stones lose light out of their sides. This can make portions of the diamond, or the entire diamond, appear dark. Ideal cut stones do not lose their light. Instead, the light travels through the stone to the bottom and bounces back out the top. This is what creates the brilliance of the diamond and makes it sparkle.


When jewelers refer to a diamond ring’s symmetry, they are referring to the alignment of the diamond’s facets. A facet is a flat and polished section of the stone. These facets are created to bounce light off. When a diamond reflects light off of a facet, it is called scintillation. If a diamond’s facets are misaligned, you will not have this effect. Again, the diamond can appear dull and lifeless.



All facets’ surfaces should be smooth and polished to ensure that light reflects off them properly.


  • Broken or chipped culet (a tiny facet at the bottom of the stone)
  • A missing or off-center culet
  • Extra or misaligned facets
  • A too thick (poor proportions) or too thick (too fragile) girdle (the edge that is created when the crown of the diamond meets the pavilion)
  • Girdles with tiny cracks
  • Sloping tables (the flat part of the diamond at the top)


Always buy your diamonds from a reputable jeweler or store. Ask to see the diamond’s certification so you can verify what properties/grading the diamond has. Examine multiple diamonds so you can compare the cuts with each other.  Never be afraid to ask you jeweler to disclose any flaws with the diamond’s cut

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