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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 $738 NZD
As of November 6, 2026
Save $1,402 NZD (66%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $2,140 NZD at MOH London · As of November 7, 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 6, 2026, with prices from $738 to $2,140, a $1,402 spread on the same certified stone. MOH London lists it at $2,140. 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: $2,140 NZD|Low: $579 NZD|High: $2,167 NZD|Avg: $1,228 NZD|-0.3%
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 7, 2026
Retailer 13$738 NZD
Retailer 11$859 NZD
Retailer 7$969 NZD
Retailer 9$1,075 NZD
Retailer 2$1,154 NZD
Retailer 12$1,160 NZD
Retailer 10$1,191 NZD
Retailer 4$1,290 NZD
Retailer 3$1,304 NZD
Retailer 6$1,385 NZD
Retailer 5$1,393 NZD
Retailer 8$1,443 NZD
MOH London$2,140 NZD

45 data points across 13 retailers

13 retailers$738 NZD to $2,140 NZD

A
Cheapest Retailer
-
$738 NZD
A
Retailer 2
-
$859 NZD
View
Final sale: no returns
B+
Retailer 3
-
$969 NZD
View
B+
Retailer 4
-
$1,075 NZD
View
B+
Retailer 5
-
$1,154 NZD
View
B+
Retailer 6
-
$1,160 NZD
View
B+
Retailer 7
-
$1,191 NZD
View
B
Retailer 8
-
$1,290 NZD
View
B
Retailer 9
-
$1,304 NZD
View
B+
Retailer 10
-
$1,385 NZD
View
Retailer 11
-
$1,393 NZD
View
Price last confirmed 35 days ago
B+
Retailer 12
-
$1,443 NZD
View
Most Expensive
B
MOH London
73DB74BBB · Nov 7
$2,140 NZD
£934 GBP
View
12 more retailers have this diamond
Prices start from $738 NZDSave up to $1,402 NZD

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
$738 NZD