Diamond Cut

Facets and light

When balancing the many characteristics diamonds have, the quality of the cut is a diamond’s most important attribute. The quality of the cut often has the strongest influence on a diamond’s allure and beauty.

The quality of the diamond cut is measured by the balance of all of its measurements to produce the most light from the top of a stone. If a diamond is too shallow, the light will be lost through the bottom of the stone. If it’s too deep, the light will fall through the sides.

A diamond’s cut quality can impact the visual look of its size, color, and most importantly the way it sparkles for the wearer. At Mark Peter’s, we help you find the balance of cut quality along with carat weight and color to so that you choose the perfect diamond.

GIA® Cut Grades

Ideal Cut

A very limited number of stones. Roughly the top 5% of stones will reach this level of perfection. A “Ideal Cut” diamond will reflect and shine nearly all of the light that enters it.

Very Good Cut

This diamond sits at the top 15% of the quality cut scale. This is a beautiful stone, but the light pattern will be very slightly under Ideal Cut diamonds.

Good Cut

This diamond accounts for 25% of the diamond market based on their quality of cuts. These diamonds reflect a majority of the light that enters them but will dance less for the eyes than an Ideal Cut or Very Good Cut.

Fair Cut

A quality diamond, but not as brilliant as a Good Cut. With a Fair Cut, this can mean that the cutter worked to maximize carat weight or to avoid inclusions.

Slightly Included (SI1/SI2)

Imperfections are visible without 10x magnification. In some cases, they are visible to the naked eye, depending on placement and size. The greatest price drop occurs between SI1 to the VS range of clarity.

Included (I1)

Inclusions visible to the naked eye. The scale continues down towards I2 / I3, but we do not generally carry these at Mark Peter's Diamond Designs or suggest them for our buyers.

Poor Cut

These diamonds are significantly out of proportion with much too deep or too shallow cuts. This quality will cause the diamonds to lose light either out of the sides or the bottom of the stone and reduce the diamond’s sparkle.

Diamond Shapes

Brilliant And Step-Cut Diamonds

Diamonds that are brilliant-cut have facets that radiate from the center due to their triangular and kit shapes. Whereas steop cuts are made from long and skinny stepped facets that are made to produce a house of mirrors effect.

Round Brilliant Cut

The most popular shape for diamond engagement rings, it is also the most available shape of stone on the market. If you’re looking for very specific characteristics, often the most options will be found in Round Brilliant Cuts. Over many years, the Round Brilliant Cut has been perfected with a focus on producing the most sparkling and brilliant stones possible.

Cushion Cut

Known for showing increased brilliance thanks to large facets and rounded edges. The Brilliant-Cut diamond can sometimes be difficult to distinguish between other cuts, depending on how obvious the curves along each edge. are

Emerald Cut

Cut with rectangular facets, featuring a large & open table, this cut isn’t uniform in its length-width ratio. Each stone is slightly different in shape/size. They can be longer, shorter, or even square. Pay particular attention to clarity. The large open table draws attention to this characteristic, often with SI2 or worse stones, it can be easy to look through the table to find inclusions.

Princess Cut

Known for sharp, pointed corners and beautiful fiery brilliance. While the shape is generally square, this characteristic will vary from stone to stone.

Asscher Cut

Very similar to an emerald cut but it is much more square. The length to width ratio on an Asscher-Cut diamond will be close to 1.

Marquiese Cut

Generally long and skinny with a focus on making the stone look as large as possible for the given carat weight. It will also make one’s fingers look even longer and skinnier.

Radiant Cut

This cut can be more square or more rectangular. You can distinguish them by their trimmed corners.

Pear Cut

These stones vary in shapes of a teardrop. Like the mMarquise, this Brilliant-Cut Diamond often makes one’s fingers look longer and slimmer. Avoid a Pear-Cut that features a strong “bow-tie” effect when looking through the top of the stone.

Heart Cut

A distinctive choice of cut in exactly the shape we use to symbolize love.

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