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question about calculating carat weight

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nycguy

Rough_Rock
Joined
Apr 26, 2002
Messages
46
is there some kind of program or formula that you can input height, width, depth, pav angl, girdle, crown angle, cutlet, and get the carat weight?

thanks!
 

DiamondExpert

Brilliant_Rock
Joined
Jan 15, 2003
Messages
1,245
A general formula for SRB's (Standard Round Brilliants) with 58-60% depth and med girdle is: Ct. = height(mm)X diameter(mm)2 X 0.0061. Variations of depth and/or girdle require a 1-5% fudge factor.

For the fancy shapes things are a bit more complicated and the formulae are varied depending upon the Length:Width ratios.
 

alice123

Rough_Rock
Joined
May 7, 2003
Messages
3
great, thats helpful. does that formula only really hold true for very well cut stones or is it consistently accurate regardless of angle variation etc?
thanks!
 

DancinGirl

Shiny_Rock
Joined
Feb 23, 2003
Messages
424
Hey I never knew this little trick! Very cool! I just tried mine and it came out to be a 1.10 - and mine is a 1.07... not too bad of a difference there!
 
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