"Standard" (usual?) diameters?

[Lynn B]

As most of you know, my (beautiful!) stone is finally bought and set

(YAY!) but some recent threads have gotten me curious about diameter widths.

Is there a "standard" (or usual - or recommended?) diameter width for various carat weight stones? I''m sure there is probably some lee-way, or an acceptable "range"... but I don''t recall ever really seeing too much about that before I bought my stone. (I am particularly interested in round brilliants, of course

but any general info on other shapes would be interesting to know, too!)

Thanks!
Lynn

 

[Superidealist]

The diameter of a well cut round brilliant should be about [(Carat weight)^(1/3)]*6.50mm.

For other shapes it should be about [(Carat weight)^(1/3)]*x, where x is the appropriate measure of a well cut 1.00ct diamond of the same shape.

Enjoy your diamond.

 

[uclaure]

I'm a bit confused. What does the "^" mean? Can you calculate the diameter of a well cut .81 round brilliant.

 

[Superidealist]

The "^" indicates exponentiation. In words, the diameter of a well cut round brilliant should be about 6.50mm times the cube root of the carat weight.

In the case of a 0.81ct stone, this would be about 6.06mm.

 

[uclaure]

Thanks for clearing that up. I thought that it indicated an exponent, but just wanted to be sure. It's good to know that I remember something from high school algebra

 

[Magnum]

Here's a link someone else posted in an earlier thread if you don't want to do the math and want a rough idea:

Diameter table

 

[Lynn B]

Thanks, everyone for the info. The MATH is a little above me

(has never been my strongest suit!) but the link Magnum supplied was very easy! THANKS!

Lynn