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HRD Certified

1.00ct Round H SI1 Natural Diamond

Very Good Cut · Excellent Pol/Sym · HRD Certified
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The essentials

Graded, line by line.

1.00
Carat
H
Colour
SI1
Clarity
Very Good
Cut
Excellent
Polish
Excellent
Symmetry
None
Fluorescence
HRD
Lab
6.37 mm
Length
6.30 mm
Width
3.95 mm
Height
1.01
Ratio
TABLE58%DEPTH62.4%CROWN HT—PAVIL DP—CULET
Proportions

The anatomy of this stone.

These proportions place this stone within HRD's Very Good cut grade — near the top of the scale.

Table58%
Depth62.4%
Ratio1.01
Cut Tolerance
Excellent proportions

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

Total Depth62.4%Excellent
Good 56–67Very Good 58–64Excellent 60–63
Table58%Excellent
Good 50–67Very Good 52–62Excellent 53–58

HRD assigns this stone very good overall cut grade.

On the hand

See it, true to size.

Our live size visualiser lets you see this 1.00ct round at actual scale — photographed on a real hand, with carat and skin-tone controls so you can judge presence before you commit.

6.37 × 6.30 × 3.95 mm
Hand for diamond size comparison
Round
Skin Tone
15ct
1ct
0.2ct

Round·1ct·6.37 × 6.30 × 3.95 mm

Certificate

Verified, independently.

HRD
Independent certification
HRD Grading Report
Report no. 260000036713
About this diamond

This 1.00 carat naturally-formed round carries an H colour grade — near-colourless with subtle warmth. Graded SI1 clarity by HRD, 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 Mayfair showroom, or speak to a specialist online — we'll design something around this stone.

Grading Certificate · HRD
HRD
HRD®
HRD REPORT
Verify at hrd.com
FACSIMILE
Digital representation of the original HRD Report. Security features not reproducible.
HRD NATURAL DIAMOND GRADING REPORT
November 06, 2026
HRD Report Number260000036713
Shape and Cutting StyleRound Brilliant
Measurements6.37 - 6.30 x 3.95 mm
Grading Results
Carat Weight1.00 carat
Color GradeH
Clarity GradeSI1
Cut GradeVery Good
Additional Grading Information
PolishExcellent
SymmetryExcellent
FluorescenceNone
Inscription(s): HRD 260000036713
Proportions
Table: 58%
Depth: 62.4%
L/W Ratio: 1.01
Length: 6.37 mm
Width: 6.30 mm
Height: 3.95 mm
Clarity Characteristics
The clarity plot is on the original HRD report. Open the official report for the full diagram.
Grading Scales
HRD
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
HRD
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
HRD
CUT
SCALE
EXCELLENT
VERY GOOD
GOOD
FAIR
POOR
HRD
Results refer only to this diamond based on data verified by HRD. Not a guarantee. Use "Open in new tab" for the original.
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Diamond Details

1.00ct Round Natural Diamond, H Colour, SI1 Clarity, Very Good Cut
Total Price
£1,607Incl VAT
As low as £145 / month or interest-free.KlarnaClearpay
1.00
Carat
H
Colour
SI1
Clarity
Very Good
Cut
Excellent
Polish
Excellent
Symmetry
6.37 mm
Length
6.30 mm
Width
3.95 mm
Height
58%
Table
62.4%
Depth
None
Fluoresc.
HRD
Lab
1.01
Ratio
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