[sergejnowo]

Сообщение от NATA NOVA

where I, yokel! (I have no idea what "karatnik") ..

For size - 1 carat=0.2 grams.
When standartonoy polishing gives the following ratio of diameter of stone:
0.25 carat = 4,1 mm
0.5 carat = 5,2 mm
0.75 carat = 5,9 mm
1.00 carat = 6,5 mm
1,5 ct = 7,4 mm
2.00 carat = 8,2 mm