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Cushion|Natural|GIA

1.51ct G SI1 Cushion Natural Diamond

EX • G/SI1 • GIA 2557386199

Certificate GIA 2557386199

Diamond specifications and retailer prices

From $6,025 NZD
As of November 6, 2026
Save $6,898 NZD (53%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $12,923 NZD at MOH London · As of November 4, 2026
View at MOH London

About this 1.51ct natural cushion diamond

This 1.51ct natural cushion sits in the one-and-a-half to two carat band, graded G 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 2557386199. Listed at 10 retailers as of November 4, 2026, with prices from $6,025 to $12,923, a $6,898 spread on the same certified stone. MOH London lists it at $12,923. 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

1.51
Carat
G
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Pavilion angle36.68°
OriginNatural
Grading LabGIA
CertificateGIA 2557386199
Dimensions7.59 × 5.90 × 4.09 mm
L/W Ratio1.29
Key to symbols
Crystal, Needle
Top View
7.59 mm5.90 mm1.51 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2557386199
Side View
Table 66.0%CrownGirdle: THK-VTKPavilion 36.68°Culet: NoneDepth 69.3%

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: $12,923 NZD|Low: $6,003 NZD|High: $14,685 NZD|Avg: $8,857 NZD|-11.8%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 6$6,025 NZD
Retailer 5$7,037 NZD
Retailer 7$7,228 NZD
Retailer 4$7,456 NZD
Retailer 2$7,492 NZD
Retailer 8$8,666 NZD
Retailer 3$9,299 NZD
Retailer 9$9,310 NZD
MOH London$12,923 NZD

33 data points across 9 retailers

10 retailers$6,025 NZD to $12,923 NZD

A
Cheapest Retailer
-
$6,025 NZD
A
Retailer 2
-
$7,037 NZD
View
Price last confirmed 3 days ago
A
Retailer 3
-
$7,228 NZD
View
A
Retailer 4
-
$7,456 NZD
View
A
Retailer 5
-
$7,492 NZD
View
A
Retailer 6
-
$8,666 NZD
View
A
Retailer 7
-
$9,299 NZD
View
A
Retailer 8
-
$9,310 NZD
View
Final sale: no returns
B+
Retailer 9
-
$9,377 NZD
View
Most Expensive
B+
MOH London
A5213C48E · Nov 4
$12,923 NZD
£5,641 GBP
View
9 more retailers have this diamond
Prices start from $6,025 NZDSave up to $6,898 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
1.51ct Cushion
$6,025 NZD