Duh - plonker!

[Kwant]

Lots of folks set in reverse if you had not told us it was a mistake snigger we would never have known :0)

[Julian]

(I use the [int dia + thickness] x pi to get the length.Attachment 3852

Martyn

I have always used the formula (int dia x pi) + (2 x thickness) see if it works better for you?

As has been pointed out, many designers are doing that deliberately, in fact in the old days before faceting cubic stones were often cut in half an set that way with their natural facets.



http://www.mnh.si.edu/earth/text/dyn...rowseType=name


J