The 4 Cs:  Cut

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The value of a diamond depends on the 4 Cs:  cut, color, clarity, and carat weight.

Scroll down for more information on diamond cuts.

Cut Grade

The quality of a diamond's cut directly affects its brilliance.  The Gemological Institute of America (GIA) has developed a Diamond Cut Grade Scale that grades a diamond's overall proportions.  It's based on the assessment of the following 7 components:

• Brightness

• Fire

• Scintillation

• Weight Ratio

• Durability

• Polish

• Symmetry​
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​The following measurements are factored into the overall cut grade:

• Table Size

• Total Depth Percentage

• Crown Height

• Crown Angle

• Pavilion Depth

• Pavilion Angle

• Girdle Thickness

• Star Facet Length

• Lower Girdle Facet Length
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• Culet
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Diamond Shapes / Cutting Styles

Photo courtesy of James & Company

• Marquise Brilliant Cut

• Radiant Cut

• Trillion Cut

• Baguette

• Oval Brilliant Cut

• Emerald Cut

• Princess Cut

• Round Brilliant Cut

• Asscher Cut

• Cushion Cut

• Tapered Baguette

• Heart Shape Brilliant Cut

• Pear Shape Brilliant Cut

​(& more)
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Diamond Shapes Gallery

Photos courtesy of Scott Papper, GIA GG, AJP, CM (NAJA), Global Gemology & Appraisals