CaratHunter
Plans
Cushion|Natural|GIA

1.51ct J SI1 Cushion Natural Diamond

EX • J/SI1 • GIA 1236988663

Certificate GIA 1236988663

Diamond specifications and retailer prices

From $3,215 AUD
HK$17,600 HKD
As of November 2, 2026
Save $3,786 AUD (54%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $7,000 AUD at MOH London · As of November 1, 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 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 1236988663. Listed at 20 retailers as of November 1, 2026, with prices from $3,215 to $7,000, a $3,786 spread on the same certified stone. MOH London lists it at $7,000. 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 1236988663
Dimensions7.23 × 5.78 × 3.97 mm
L/W Ratio1.25
Girdle conditionFaceted
Top View
7.23 mm5.78 mm1.51 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1236988663
Side View
Table 67.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 68.6%

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 2
Current: $7,000 AUD|Low: $3,160 AUD|High: $7,752 AUD|Avg: $4,500 AUD|-9.7%
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
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
November 2, 2026
Retailer 12$3,215 AUD
Retailer 4$3,235 AUD
Retailer 18$3,502 AUD
Retailer 16$3,564 AUD
Retailer 7$3,570 AUD
Retailer 3$3,863 AUD
Retailer 6$3,895 AUD
Retailer 10$3,897 AUD
Retailer 15$3,955 AUD
Retailer 2$4,024 AUD
Retailer 13$4,103 AUD
Retailer 17$4,159 AUD
Retailer 8$4,339 AUD
Retailer 11$4,381 AUD
Retailer 14$4,991 AUD
Retailer 5$5,388 AUD
Retailer 9$6,940 AUD
MOH London$7,000 AUD

21 data points across 18 retailers

20 retailers$3,215 AUD to $7,000 AUD

A
Cheapest Retailer
-
$3,215 AUD
HK$17,600 HKD
A
Retailer 2
-
$3,235 AUD
$2,267 USD
View
A
Retailer 3
-
$3,502 AUD
$2,454 USD
View
A
Retailer 4
-
$3,564 AUD
$2,498 USD
View
Final sale: no returns
A
Retailer 5
-
$3,570 AUD
$2,502 USD
View
A
Retailer 6
-
$3,863 AUD
View
A
Retailer 7
-
$3,895 AUD
$2,730 USD
View
A
Retailer 8
-
$3,897 AUD
$2,731 USD
View
A
Retailer 9
-
$3,955 AUD
$2,772 USD
View
A
Retailer 10
-
$4,024 AUD
$2,820 USD
View
A
Retailer 11
-
$4,103 AUD
£2,264 GBP
View
A
Retailer 12
-
$4,159 AUD
£2,295 GBP
View
Retailer 13
-
$4,339 AUD
$3,041 USD
View
Price last confirmed 13 days ago
A
Retailer 14
-
$4,381 AUD
$3,070 USD
View
B+
Retailer 15
-
$4,942 AUD
View
B+
Retailer 16
-
$4,991 AUD
€3,331 EUR
View
Retailer 17
-
$5,020 AUD
View
Price last confirmed 25 days ago
B+
Retailer 18
-
$5,388 AUD
ZAR 61,001 ZAR
View
Retailer 19
-
$6,940 AUD
$4,863 USD
View
Price last confirmed 9 days ago
Most Expensive
B+
MOH London
F1C44731E · Nov 1
$7,000 AUD
£3,863 GBP
View
19 more retailers have this diamond
Prices start from $3,215 AUDSave up to $3,786 AUD

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
$3,215 AUD