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Understanding Diamond Girdle & Cut Quality: A Comprehensive Guide


Question
QUESTION: I'm a little confused.  I've read that crown, girdle,pavilion angles and total depth are important when purchasing a diamond because it determines the cut.  Can you have a 1.03 ct. diamond with a depth of 60.7%, table 60% with a very thin - medium girdle? I've read that  tables that are 60% should NOT have less that thin or more than slightly thick girdles.  They said it was an ideal cut, how can that be. Is the diamond warped? Am I right that you should never have a round diamond with an ex. thin to thin faceted girdle because it's to fragile?  Thank you in advance for your time in anwering my questions.

ANSWER: The answer to your questions is yes. The diamond is not warped.
I can answer your questions, however for a full understanding of this subject contact AGS - American Gem Society on an explanation of terms pertaining to Ideal Cut Diamonds.

Thanks for writting !!!

Good Luck

A.DeMello Gemological Laboratories
Arthur DeMello GG (GIA) J-Bar (JVC) USPAP
http://www.nationalgemologicallaboratory.com

New York City - Westchester - Long Island - Boston - Burlington - Newton Wellesley - Quincy - Hingham - Hartford - East Berlin - Stamford - Shelton - Jersey City - Parsippany - Morristown - Hackensack - East Brunswick - Bedminster - Bridgewater

---------- FOLLOW-UP ----------

QUESTION: Thanks for the reply but you didn't answer the girdle question.  Is very thin bad for a diamond with a 60% table?  I'm happy to hear it's not warped though.  ~Uriko

Answer
The girdle edge can be very thin - slightly thick and be OK however it is independent from the table percentage. There isn't a direct relationship between the table percentage and the girdle edge.
Your ok with a very thin girdle edge and  60% table.

A.DeMello Gemological Laboratories
Arthur DeMello GG (GIA) J-Bar (JVC) USPAP
http://www.nationalgemologicallaboratory.com

New York City - Westchester - Long Island - Boston - Burlington - Newton Wellesley - Quincy - Hingham - Hartford - East Berlin - Stamford - Shelton - Jersey City - Parsippany - Morristown - Hackensack - East Brunswick - Bedminster - Bridgewater