of a diamond refers to how well a stone is cut and faceted to bring
out the full beauty of the rough crystal. The make affects the beauty
of a diamond much more than perfect colour or clarity. You may wish
to note even with all the attention given to the 4 "Cs "
of diamond grading and evaluation, the make is actually the greatest
factor in the beauty. Oddly, the make is not generally graded on
most laboratory certificates. (Only the American Gemological Society
(AGS) - assigns a grade to the make, with "0 deductions"
being the best grade.)
Proportion determines the flow of light more than other quality
factors. Proportions that are too deep or too shallow both allow
light to leak out the bottom and lessen the amount of light that
strikes your eye.
given to the overall uniformity of a stone's cut. Poor symmetry
will hurt a diamond's sparkle and fire.
polish is crucial for maximum brilliance of a diamond. It also determines
the percentage of light reflected from and refracted within and
between the facets.
grading terminology for Proportion, Symmetry & Polish
or E - Excellent
or VGD - Very Good
GO, G - Good
FR, FA - Fair
PO, P - Poor
VE, - Very Poor