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1.50ct Cushion diamond
IGI Certified

1.50ct Cushion F SI1 Lab Grown Diamond

- Cut · Excellent Pol/Sym · IGI Certified
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The essentials

Graded, line by line.

1.50
Carat
F
Color
SI1
Clarity
-
Cut
Excellent
Polish
Excellent
Symmetry
None
Fluorescence
IGI
Lab
6.62 mm
Length
6.47 mm
Width
4.11 mm
Height
1.02
Ratio

Note: IGI does not assign a Cut grade for fancy-shape diamonds. Polish and Symmetry are the primary finishing indicators.

TABLE64.5%DEPTH63.5%CROWN HT—PAVIL DP—CULETMEASUREMENTS6.62 × 6.47 × 4.11 mm
Proportions

The anatomy of this stone.

A well-proportioned cushion displays maximum brilliance. Table and depth are the primary cut quality indicators for fancy shapes.

Table64.5%
Depth63.5%
Ratio1.02
Cut Tolerance
Excellent proportions

Both measurements sit in the top band — proportioned for maximum brilliance.

Total Depth63.5%Excellent
Good 57–74Very Good 58–70Excellent 60–66
Table64.5%Excellent
Good 55–72Very Good 57–69Excellent 60–67

Note: IGI does not assign a Cut grade for fancy-shape diamonds. Polish and Symmetry are the primary finishing indicators.

On the hand

See it, true to size.

Our live size visualiser lets you see this 1.50ct cushion at actual scale — photographed on a real hand, with carat and skin-tone controls so you can judge presence before you commit.

6.62 × 6.47 × 4.11 mm
Hand for diamond size comparison
Cushion
Skin Tone
15ct
1.5ct
0.2ct

Cushion·1.5ct·6.62 × 6.47 × 4.11 mm

Certificate

Verified, independently.

IGI
Independent certification
IGI Grading Report
Report no. LG522251870
About this diamond

This 1.50 carat laboratory-grown cushion carries F color grade — near-colorless, exceptional quality. Graded SI1 clarity by IGI, it's a stone with character that goes well beyond the numbers — ready to be set into something made around it.

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The next step

Every Rêve diamond is set into a bespoke design.

Crafted to your specifications and ready in 2–2.5 weeks. Book a private appointment at our 5th Avenue or Beverly Hills showroom, or speak to a specialist online — we'll design something around this stone.

Grading Certificate · IGI
IGI
IGI®
IGI REPORT
Verify at IGI.org
FACSIMILE
Digital representation of the original IGI Report. Security features not reproducible.
IGI NATURAL DIAMOND GRADING REPORT
September 23, 2026
IGI Report NumberLG522251870
Shape and Cutting StyleCushion
Measurements6.62 - 6.47 x 4.11 mm
Grading Results
Carat Weight1.50 carat
Color GradeF
Clarity GradeSI1
Cut Grade-
Additional Grading Information
PolishExcellent
SymmetryExcellent
FluorescenceNone
Inscription(s): IGI LG522251870
Proportions
Table: 64.5%
Depth: 63.5%
L/W Ratio: 1.02
Length: 6.62 mm
Width: 6.47 mm
Height: 4.11 mm
Clarity Characteristics
The clarity plot is on the original IGI report. Open the official report for the full diagram.
Grading Scales
IGI
COLOR
SCALE
COLORLESS
D
E
F
NEAR COLORLESS
G
H
I
J
FAINT
K
L
M
VERY LIGHT
N
O
P
Q
R
LIGHT
S
T
U
V
W
X
Y
Z
IGI
CLARITY
SCALE
FLAWLESS
FL
INTERNALLY FLAWLESS
IF
VERY VERY SLIGHTLY INCLUDED
VVS1
VVS2
VERY SLIGHTLY INCLUDED
VS1
VS2
SLIGHTLY INCLUDED
SI1
SI2
INCLUDED
I1
I2
I3
IGI
CUT
SCALE
EXCELLENT
VERY GOOD
GOOD
FAIR
POOR
IGI
Results refer only to this diamond based on data verified by IGI. Not a guarantee. Use "Open in new tab" for the original.
× 40 Zoom

Diamond Details

1.50ct Cushion Lab Grown Diamond, F Color, SI1 Clarity, - Cut
Total Price
$1,134
1.50
Carat
F
Color
SI1
Clarity
-
Cut
Excellent
Polish
Excellent
Symmetry
6.62 mm
Length
6.47 mm
Width
4.11 mm
Height
64.5%
Table
63.5%
Depth
None
Fluoresc.
IGI
Lab
1.02
Ratio
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