|
Guide to Diamond
Grades
|
|
Grade
|
Color
|
Clarity
|
Description
|
|
AA
|
G-I
|
VS1-VS2
|
Small
inclusions, difficult to see with loupe, “eye clean”
|
|
A
|
G-I
|
SI1-SI2
|
Small
inclusions, easy to see w/ loupe, “eye clean”
|
|
B
|
G-I
|
I1
|
Small
eye visible inclusions
|
|
C
|
TLB
|
I3
|
Large
and/or numerous inclusions, not “eye clean”, light brown color (K-M)
|
Diamonds
- Square
'A'
Square Diamond
|
|
|
Size
|
Avg.
Weight
|
Price/stone |
|
1.25
STEP!
|
0.01
|
$7.13
|
|
1.25
PRINCESS!
|
0.02
|
$13.50
|
|
1.50
STEP
|
0.02
|
$15.00
|
|
1.50
PRINCE
|
0.03
|
$20.25
|
|
1.75
STEP
|
0.03
|
$23.63
|
|
1.75PRINCE
|
0.04
|
$32.40
|
|
2.0
STEP
|
0.05
|
$50.63
|
|
2.0
PRINCE
|
0.05
|
$40.50
|
|
2.25PRINCE
|
0.07
|
$56.70
|
|
2.5
STEP
|
0.10
|
$116.25
|
|
2.5
PRINCE
|
0.10
|
$90.00
|
|
2.75PRINCE
|
0.13
|
$126.75
|
|
3.0
PRINCE
|
0.18
|
$189.00
|
|
3.25
PRINCE
|
0.24
|
$266.40
|
|
3.5
PRINCE
|
0.26
|
$321.75
|
|
3.75PRINCE
|
0.31
|
$441.75
|
|
4.0
PRINCE
|
0.37
|
$596.63
|
'B'
Square Diamond
|
Size
|
Avg.
Weight
|
Price/stone |
|
1.25
PRINCESS!
|
0.02
|
$11.70
|
|
1.5
PRINCESS
|
0.03
|
$17.55
|
|
1.75
PRINCESS
|
0.04
|
$29.40
|
|
2.0
PRINCESS
|
0.05
|
$36.75
|
|
2.25
PRINCESS
|
0.07
|
$51.45
|
|
2.5
PRINCESS
|
0.09
|
$74.25
|
|
2.75
PRINCESS
|
0.11
|
$97.35
|
|
3.0
PRINCESS
|
0.16
|
$150.00
|
|
3.25
PRINCESS
|
0.20
|
$195.00
|
|
3.5
PRINCESS
|
0.26
|
$282.75
|
|
3.75
PRINCESS
|
0.33
|
$420.75
|
|
4.0
PRINCESS
|
0.40
|
$570.00
|
|
