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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 $524 SGD
As of November 6, 2026
Save $1,003 SGD (66%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $1,527 SGD 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 $524 to $1,527, a $1,003 spread on the same certified stone. MOH London lists it at $1,527. 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
Colour
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: $1,527 SGD|Low: $411 SGD|High: $1,540 SGD|Avg: $872 SGD|+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$524 SGD
Retailer 11$610 SGD
Retailer 6$688 SGD
Retailer 9$764 SGD
Retailer 7$820 SGD
Retailer 12$824 SGD
Retailer 10$846 SGD
Retailer 4$916 SGD
Retailer 3$927 SGD
Retailer 2$984 SGD
Retailer 5$989 SGD
Retailer 8$1,025 SGD
MOH London$1,527 SGD

44 data points across 13 retailers

13 retailers$524 SGD to $1,527 SGD

A
Cheapest Retailer
-
$524 SGD
A
Retailer 2
-
$610 SGD
View
Final sale: no returns
B+
Retailer 3
-
$688 SGD
View
B+
Retailer 4
-
$764 SGD
View
B+
Retailer 5
-
$820 SGD
View
B+
Retailer 6
-
$824 SGD
View
B+
Retailer 7
-
$846 SGD
View
B
Retailer 8
-
$916 SGD
View
B
Retailer 9
-
$927 SGD
View
B+
Retailer 10
-
$984 SGD
View
Retailer 11
-
$989 SGD
View
Price last confirmed 35 days ago
B+
Retailer 12
-
$1,025 SGD
View
Most Expensive
B
MOH London
73DB74BBB · Nov 4
$1,527 SGD
£938 GBP
View
12 more retailers have this diamond
Prices start from $524 SGDSave up to $1,003 SGD

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
$524 SGD