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Cushion|Natural|GIA

1.51ct J SI1 Cushion Natural Diamond

EX • J/SI1 • GIA 6551130924

Certificate GIA 6551130924

Diamond specifications and retailer prices

From $4,048 NZD
As of November 5, 2026
Save $3,323 NZD (45%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $7,371 NZD at Helzberg Diamonds · As of November 6, 2026
View at Helzberg Diamonds

About this 1.51ct natural cushion diamond

This 1.51ct natural cushion sits in the one-and-a-half to two carat band, graded J 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 6551130924. Listed at 12 retailers as of November 5, 2026, with prices from $4,048 to $7,371, a $3,323 spread on the same certified stone. Helzberg Diamonds lists it at $7,371. 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
J
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6551130924
Dimensions6.85 × 6.09 × 4.22 mm
L/W Ratio1.12
Top View
6.85 mm6.09 mm1.51 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6551130924
Side View
Table 61.0%CrownGirdle: STK-THKPavilionCulet: 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 5
Current: $7,371 NZD|Low: $4,025 NZD|High: $7,827 NZD|Avg: $5,365 NZD|-5.8%
Helzberg Diamonds
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 8$4,048 NZD
Retailer 2$4,212 NZD
Retailer 9$4,284 NZD
Retailer 5$4,521 NZD
Retailer 7$4,584 NZD
Retailer 3$4,663 NZD
Retailer 4$4,883 NZD
Retailer 12$5,046 NZD
Retailer 13$5,278 NZD
Retailer 6$6,043 NZD
Retailer 10$6,530 NZD
Retailer 11$7,293 NZD
Helzberg Diamonds$7,371 NZD

32 data points across 13 retailers

12 retailers$4,048 NZD to $7,371 NZD

A
Cheapest Retailer
-
$4,048 NZD
A
Retailer 2
-
$4,212 NZD
View
A
Retailer 3
-
$4,284 NZD
View
A
Retailer 4
-
$4,584 NZD
View
A
Retailer 5
-
$4,663 NZD
View
A
Retailer 6
-
$4,883 NZD
View
A
Retailer 7
-
$5,046 NZD
View
A
Retailer 8
-
$5,278 NZD
View
A
Retailer 9
-
$6,043 NZD
View
B+
Retailer 10
-
$6,530 NZD
View
B+
Retailer 11
-
$7,293 NZD
View
Most Expensive
B+
Helzberg Diamonds
XZRMLLHHJGPIK · Nov 6
$7,371 NZD
$4,086 USD
View
11 more retailers have this diamond
Prices start from $4,048 NZDSave up to $3,323 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
$4,048 NZD