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what should diameter be?

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Margarw

Rough_Rock
Joined
Jan 12, 2007
Messages
44
i tired the diamond calc, but can''t get it to work properly. can someone help me with what the diameter for a well cut 1.27 round should be? Thanks!
 

Finding_Neverland

Shiny_Rock
Joined
Jan 10, 2007
Messages
412
From what I''ve read, somewhere around 7mm, give or take, for a well cut round.
 

starryeyed

Ideal_Rock
Joined
Nov 6, 2006
Messages
2,398
I concur, around 7mm. You can use this formula:

diameter x diameter x depth x 0.0061 = carat weight

You can assume a depth percentage, for example: depth = 0.593 x diameter. This is the Tolkowsky depth.

Substituting and solving for 1.27 carats:

(diameter)^3 = 1.27/(0.0061 * 0.593) = 351.09
diameter = (351.09)^0.3333 = 7.05 mm

So you could run this calc for different depth percentages, but my guess is they would have to be approx. within the "ideal range". Does this make sense?
 
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