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Cushion|Natural|GIA

1.51ct J SI1 Cushion Natural Diamond

EX • J/SI1 • GIA 1236988663

Certificate GIA 1236988663

Diamond specifications and retailer prices

From HK$17,676 HKD
As of November 2, 2026
Save HK$21,545 HKD (55%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: HK$39,220 HKD at MOH London · As of November 2, 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 2, 2026, with prices from HK$17,676 to HK$39,220, a HK$21,545 spread on the same certified stone. MOH London lists it at HK$39,220. 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: HK$39,220 HKD|Low: HK$17,374 HKD|High: HK$42,628 HKD|Avg: HK$24,747 HKD|-8.0%
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 13HK$17,676 HKD
Retailer 4HK$17,787 HKD
Retailer 3HK$19,254 HKD
Retailer 17HK$19,600 HKD
Retailer 7HK$19,628 HKD
Retailer 6HK$21,420 HKD
Retailer 10HK$21,428 HKD
Retailer 2HK$21,587 HKD
Retailer 16HK$21,750 HKD
Retailer 11HK$22,126 HKD
Retailer 14HK$22,561 HKD
Retailer 18HK$22,868 HKD
Retailer 8HK$23,860 HKD
Retailer 12HK$24,088 HKD
Retailer 15HK$27,442 HKD
Retailer 5HK$29,627 HKD
Retailer 9HK$38,159 HKD
MOH LondonHK$39,220 HKD

20 data points across 18 retailers

20 retailersHK$17,676 HKD to HK$39,220 HKD

A
Cheapest Retailer
-
HK$17,676 HKD
A
Retailer 2
-
HK$17,787 HKD
$2,267 USD
View
A
Retailer 3
-
HK$19,254 HKD
$2,454 USD
View
A
Retailer 4
-
HK$19,600 HKD
$2,498 USD
View
Final sale: no returns
A
Retailer 5
-
HK$19,628 HKD
$2,502 USD
View
A
Retailer 6
-
HK$21,420 HKD
$2,730 USD
View
A
Retailer 7
-
HK$21,428 HKD
$2,731 USD
View
A
Retailer 8
-
HK$21,587 HKD
A$4,233 AUD
View
A
Retailer 9
-
HK$21,750 HKD
$2,772 USD
View
A
Retailer 10
-
HK$22,126 HKD
$2,820 USD
View
A
Retailer 11
-
HK$22,561 HKD
£2,264 GBP
View
A
Retailer 12
-
HK$22,868 HKD
£2,295 GBP
View
Retailer 13
-
HK$23,860 HKD
$3,041 USD
View
Price last confirmed 13 days ago
A
Retailer 14
-
HK$24,088 HKD
$3,070 USD
View
B+
Retailer 15
-
HK$27,173 HKD
A$5,328 AUD
View
B+
Retailer 16
-
HK$27,442 HKD
€3,331 EUR
View
Retailer 17
-
HK$27,604 HKD
A$5,413 AUD
View
Price last confirmed 26 days ago
B+
Retailer 18
-
HK$29,627 HKD
ZAR 61,001 ZAR
View
Retailer 19
-
HK$38,159 HKD
$4,863 USD
View
Price last confirmed 10 days ago
Most Expensive
B+
MOH London
F1C44731E · Nov 2
HK$39,220 HKD
£3,936 GBP
View
19 more retailers have this diamond
Prices start from HK$17,676 HKDSave up to HK$21,545 HKD

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
HK$17,676 HKD