CaratHunter
Plans
Cushion|Natural|GIA

1.51ct E SI1 Cushion Natural Diamond

EX • E/SI1 • GIA 6405967587

Certificate GIA 6405967587

Diamond specifications and retailer prices

From $9,415 NZD
As of November 6, 2026
Save $9,000 NZD (49%) vs most expensive(unlock to see where)
29 retailers carry this diamond
Most expensive: $18,415 NZD at MOH London · As of November 7, 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 E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6405967587. Listed at 29 retailers as of November 6, 2026, with prices from $9,415 to $18,415, a $9,000 spread on the same certified stone. MOH London lists it at $18,415. 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
E
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 6405967587
Dimensions6.51 × 6.05 × 4.51 mm
L/W Ratio1.08
Top View
6.51 mm6.05 mm1.51 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 6405967587
Side View
Table 60.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 74.6%

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: $18,415 NZD|Low: $9,912 NZD|High: $18,735 NZD|Avg: $13,505 NZD|-1.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 7, 2026
Retailer 4$9,912 NZD
Retailer 12$9,929 NZD
Retailer 2$11,006 NZD
Retailer 8$11,179 NZD
Retailer 5$11,769 NZD
Retailer 9$11,963 NZD
Retailer 3$12,196 NZD
Retailer 7$13,352 NZD
Retailer 10$13,652 NZD
Retailer 11$15,331 NZD
Retailer 6$15,405 NZD
MOH London$18,415 NZD

33 data points across 12 retailers

29 retailers$9,415 NZD to $18,415 NZD

A
Cheapest Retailer
-
$9,415 NZD
A
Retailer 2
-
$9,817 NZD
View
Retailer 3
-
$9,912 NZD
View
Price last confirmed 10 days ago
A
Retailer 4
-
$9,929 NZD
View
A
Retailer 5
-
$10,022 NZD
View
Final sale: no returns
A
Retailer 6
-
$10,060 NZD
View
A
Retailer 7
-
$10,517 NZD
View
A
Retailer 8
-
$10,589 NZD
View
A
Retailer 9
-
$10,692 NZD
View
B+
Retailer 10
-
$11,006 NZD
View
B+
Retailer 11
-
$11,179 NZD
View
B+
Retailer 12
-
$11,384 NZD
View
B+
Retailer 13
-
$11,769 NZD
View
B+
Retailer 14
-
$11,843 NZD
View
B+
Retailer 15
-
$11,963 NZD
View
B+
Retailer 16
-
$12,007 NZD
View
Retailer 17
-
$12,196 NZD
View
Price last confirmed 16 days ago
B+
Retailer 18
-
$12,663 NZD
View
B+
Retailer 19
-
$12,663 NZD
View
B+
Retailer 20
-
$13,096 NZD
View
B+
Retailer 21
-
$13,352 NZD
View
B+
Retailer 22
-
$13,652 NZD
View
Retailer 23
-
$13,850 NZD
View
Price last confirmed 15 days ago
B
Retailer 24
-
$14,242 NZD
View
B
Retailer 25
-
$14,395 NZD
View
B+
Retailer 26
-
$15,331 NZD
View
B+
Retailer 27
-
$15,405 NZD
View
B
Retailer 28
-
$18,216 NZD
View
Most Expensive
B
MOH London
A7CF1D2F7 · Nov 7
$18,415 NZD
£8,038 GBP
View
28 more retailers have this diamond
Prices start from $9,415 NZDSave up to $9,000 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
$9,415 NZD