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Cushion|Natural|GIA

0.51ct H SI1 Cushion Natural Diamond

EX • H/SI1 • GIA 6521626623

Certificate GIA 6521626623

Diamond specifications and retailer prices

From $575 CAD
As of November 6, 2026
Save $1,100 CAD (66%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $1,676 CAD at MOH London · As of November 4, 2026
View at MOH London

About this 0.51ct natural cushion diamond

This 0.51ct natural cushion sits in the half to three-quarter carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6521626623. Listed at 13 retailers as of November 4, 2026, with prices from $575 to $1,676, a $1,100 spread on the same certified stone. MOH London lists it at $1,676. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

0.51
Carat
H
Color
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6521626623
Dimensions5.01 × 4.55 × 2.99 mm
L/W Ratio1.10
Top View
5.01 mm4.55 mm0.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6521626623
Side View
Table 64.0%CrownGirdle: MED-MEDPavilionCulet: NoneDepth 65.7%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $1,676 CAD|Low: $452 CAD|High: $1,690 CAD|Avg: $957 CAD|+0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 6, 2026
Retailer 13$575 CAD
Retailer 11$670 CAD
Retailer 6$755 CAD
Retailer 9$838 CAD
Retailer 7$900 CAD
Retailer 12$904 CAD
Retailer 10$928 CAD
Retailer 4$1,006 CAD
Retailer 3$1,017 CAD
Retailer 2$1,080 CAD
Retailer 5$1,086 CAD
Retailer 8$1,125 CAD
MOH London$1,676 CAD

44 data points across 13 retailers

13 retailers$575 CAD to $1,676 CAD

A
Cheapest Retailer
-
$575 CAD
A
Retailer 2
-
$670 CAD
View
Final sale: no returns
B+
Retailer 3
-
$755 CAD
View
B+
Retailer 4
-
$838 CAD
View
B+
Retailer 5
-
$900 CAD
View
B+
Retailer 6
-
$904 CAD
View
B+
Retailer 7
-
$928 CAD
View
B
Retailer 8
-
$1,006 CAD
View
B
Retailer 9
-
$1,017 CAD
View
B+
Retailer 10
-
$1,080 CAD
View
Retailer 11
-
$1,086 CAD
View
Price last confirmed 35 days ago
B+
Retailer 12
-
$1,125 CAD
View
Most Expensive
B
MOH London
73DB74BBB · Nov 4
$1,676 CAD
£938 GBP
View
12 more retailers have this diamond
Prices start from $575 CADSave up to $1,100 CAD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
0.51ct Cushion
$575 CAD