Rapaport specification
RDC specification |
À |
 |
| Height % |
57,5 – 62,5 |
57,0 – 63,0 |
| Table %
|
55 - 64 |
55 – 65 |
| Girdle
|
Not very thin, not very thick, thick |
See "À" |
| Culet |
Should not be large or chipped |
See "À" |
| Polish
|
“Õîðîøàÿ” èëè ëó÷øå |
See "À" |
| Ñèììåòðèÿ |
Good or better |
See "À" |
| Fluorescence |
Weak or medium (i.e.weak or absent) |
Medium fluorescence is tolerable but not desirable |
| Commentaries |
No graining |
Surface graining is tolerable |
| |
No reproofs regarding crown angle |
See "À" |
| |
No laser drillholes |
See "À" |
| |
No treatment for improving color or clarity |
|
| Stones which cannot be referred to as category "À" or "Â", are assigned to category "Ñ". |
|