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 £1,679 GBP
HK$17,600 HKD
As of November 2, 2026
Save £2,046 GBP (55%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £3,725 GBP 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 £1,679 to £3,725, a £2,046 spread on the same certified stone. MOH London lists it at £3,725. 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: £3,725 GBP|Low: £1,650 GBP|High: £4,049 GBP|Avg: £2,350 GBP|-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 13£1,679 GBP
Retailer 4£1,689 GBP
Retailer 3£1,829 GBP
Retailer 17£1,861 GBP
Retailer 7£1,864 GBP
Retailer 6£2,034 GBP
Retailer 10£2,035 GBP
Retailer 2£2,050 GBP
Retailer 16£2,066 GBP
Retailer 11£2,101 GBP
Retailer 14£2,143 GBP
Retailer 18£2,172 GBP
Retailer 8£2,266 GBP
Retailer 12£2,288 GBP
Retailer 15£2,606 GBP
Retailer 5£2,814 GBP
Retailer 9£3,624 GBP
MOH London£3,725 GBP

20 data points across 18 retailers

20 retailers£1,679 GBP to £3,725 GBP

A
Cheapest Retailer
-
£1,679 GBP
HK$17,600 HKD
A
Retailer 2
-
£1,689 GBP
$2,267 USD
View
A
Retailer 3
-
£1,829 GBP
$2,454 USD
View
A
Retailer 4
-
£1,861 GBP
$2,498 USD
View
Final sale: no returns
A
Retailer 5
-
£1,864 GBP
$2,502 USD
View
A
Retailer 6
-
£2,034 GBP
$2,730 USD
View
A
Retailer 7
-
£2,035 GBP
$2,731 USD
View
A
Retailer 8
-
£2,050 GBP
A$4,233 AUD
View
A
Retailer 9
-
£2,066 GBP
$2,772 USD
View
A
Retailer 10
-
£2,101 GBP
$2,820 USD
View
A
Retailer 11
-
£2,143 GBP
View
A
Retailer 12
-
£2,172 GBP
View
Retailer 13
-
£2,266 GBP
$3,041 USD
View
Price last confirmed 13 days ago
A
Retailer 14
-
£2,288 GBP
$3,070 USD
View
B+
Retailer 15
-
£2,581 GBP
A$5,328 AUD
View
B+
Retailer 16
-
£2,606 GBP
€3,331 EUR
View
Retailer 17
-
£2,622 GBP
A$5,413 AUD
View
Price last confirmed 25 days ago
B+
Retailer 18
-
£2,814 GBP
ZAR 61,001 ZAR
View
Retailer 19
-
£3,624 GBP
$4,863 USD
View
Price last confirmed 9 days ago
Most Expensive
B+
MOH London
F1C44731E · Nov 2
£3,725 GBP
View
19 more retailers have this diamond
Prices start from £1,679 GBPSave up to £2,046 GBP

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
£1,679 GBP