Carat
The weight of a diamond is expressed in carats. 1ct = 0,2 gram
Colour
Colour is graded by comparison to masterstones under standardized artificial light, equivalent to Nortern daylight.
Indicated colours are only meant to show the difference in shades
D | E | F | G | H | I | J |
exc. white + |
exc. white |
rare white + |
rare white + |
white | slightly tinted white |
slightly tinted white |
Clarity
A diamond is "loupe clean or internally flawless" if, after examination by an experienced grader with a loupe 10 x under normal light conditions, it has been found free of internal characteristics. The other clarity grades are determined by the size, position, brightness and number of internal characteristics. External characteristics and structure phenomena can be mentioned under "identification marks" or "comments". The lowest clarity grades on the scale (indicated by p for piqué) refer to inclusions that can be seen by an experienced grader with the naked eye.
LC/IF |
VVS1 |
VVS2 |
VS1 |
VS2 |
SI1 |
SI2 |
P1 |
P2 |
P3 |
Cut
Some common diamond shapes.
BRILLIANT, OVAL, MARQUISE, PEAR, HEART, PRINCESS, EMERALD
0,02 ct. 1,7 mm |
0,03 ct. 2,0 mm |
0,04 ct. 2,2 mm |
0,05 ct 2,4 mm |
0,10 ct. 3,0 mm |
0,15 ct. 3,4 mm |
0,20 ct. 3,8 mm |
0,25 ct. 4,1 mm |
0,35 ct. 4,4 mm |
0,45 ct. 4,8 mm |
0,55 ct 5,1 mm |
0,60 ct. 5,3 mm |
0.90 ct. 6,2 mm |
1,00 ct. 6,4 mm |
1,25 ct. 6,9 mm |
1,50 ct. 7,3 mm |
1,75 ct. 7,7 mm |
2,00 ct. 8,1 mm |
Marziali Paolo - Case Nuove di Ceciliano 73/2 - 52100 AREZZO ITALY - Partita Iva 01314780519