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Depth and Table %

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scarecrow

Rough_Rock
Joined
Jun 18, 2003
Messages
5
I am confused in trying to purchase a princess cut diamond. My home jeweler states the table % should be higher than the depth percentage %. Is this true?

Are there optimal percentages for depth and table? Should the table be less than the depth?

Any expertise provided will be greatly appreciated.

Thanks for helping.
 

pricescope

Ideal_Rock
Joined
Dec 31, 1999
Messages
8,266
Scarecrow,

.

The point is that table and depth alone cannot guarantee ideal cut. You should know crown and pavilion angles as well.

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Giangi

Ideal_Rock
Joined
Jan 23, 2003
Messages
2,530
Leonid...Good suggestion, but he's talking about princesses...
To judge a princess cut properly you should know talbe, depth, crown, pavilion, girdle and culet, as well as additional tests as BrillianceScope, Ideal Scope, light leakage images...
 

Scoop

Rough_Rock
Joined
Jun 18, 2003
Messages
9
Can I feel comfortable by relying solely upon the cut grading form
from www.gemappraisers.com ?? I ask only because this tool doesn't reference pavilion angles.

Thanks.
 

Richard Sherwood

Ideal_Rock
Joined
Sep 25, 2002
Messages
4,924
Scoop, those charts will get you in the right ballpark. Then you can narrow it down considerably by viewing Idealscope photos of the contendors (or view them personally with an Idealscope). The poor performers will be immediately obvious.

Some of the vendors include Idealscope photos in their descriptions of the stones.

Scarecrow, your jeweler's got it reversed. The stones which have the same or greater depth % than table % are usually the better performers.
 

pricescope

Ideal_Rock
Joined
Dec 31, 1999
Messages
8,266
Giangi,
----------------
Leonid...Good suggestion, but he's talking about princesses...
----------------
Doh!
6.gif
Thanks, Giangi
1.gif
I was reading too fast...

You and Richard straightened it out good.
 

barry

Shiny_Rock
Joined
Mar 21, 2001
Messages
441
Table % should NOT exceed Depth % in Princess Cuts for two
reasons:

1. Crown height will be minimized; crown height is
a critical component in maximizing light output.

2. Pavillion angle wil usually be in the low 50's%
which results in light leakage.

Giangi and Richard Sherwood are giving you very
good advice. "Numbers" are good but peformance indicators
such as light leakage images, BrillianceScopes and digital
photo's are better and will give you valuable information.

Barry
www.superbcert.com
 
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