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Cushion|Natural|GIA

1.23ct J SI2 Cushion Natural Diamond

ID • J/SI2 • GIA 6365299976

Certificate GIA 6365299976

Diamond specifications and retailer prices

From £1,251 GBP
HK$13,100 HKD
As of November 1, 2026
Save £1,703 GBP (58%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £2,954 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 1.23ct natural cushion diamond

This 1.23ct natural cushion sits in the classic one-carat band, graded J colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6365299976. Listed at 13 retailers as of November 1, 2026, with prices from £1,251 to £2,954, a £1,703 spread on the same certified stone. MOH London lists it at £2,954. 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

1.23
Carat
J
Colour
SI2
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6365299976
Dimensions6.55 × 5.49 × 3.91 mm
L/W Ratio1.19
Top View
6.55 mm5.49 mm1.23 ctJ / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6365299976
Side View
Table 60.0%CrownGirdle: Very ThickPavilionCulet: NoneDepth 71.2%

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 1
Current: £2,954 GBP|Low: £1,242 GBP|High: £2,987 GBP|Avg: £1,780 GBP|-1.1%
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
November 1, 2026
Retailer 8£1,251 GBP
Retailer 12£1,524 GBP
Retailer 11£1,557 GBP
Retailer 13£1,602 GBP
Retailer 6£1,626 GBP
Retailer 10£1,687 GBP
Retailer 2£1,690 GBP
Retailer 3£1,756 GBP
Retailer 4£1,769 GBP
Retailer 14£1,790 GBP
Retailer 7£1,851 GBP
Retailer 5£2,033 GBP
Retailer 9£2,106 GBP
MOH London£2,954 GBP

25 data points across 14 retailers

13 retailers£1,251 GBP to £2,954 GBP

A
Cheapest Retailer
-
£1,251 GBP
HK$13,100 HKD
B+
Retailer 2
-
£1,524 GBP
$2,042 USD
View
B+
Retailer 3
-
£1,557 GBP
$2,086 USD
View
Final sale: no returns
B+
Retailer 4
-
£1,602 GBP
$2,147 USD
View
B
Retailer 5
-
£1,687 GBP
$2,260 USD
View
B+
Retailer 6
-
£1,690 GBP
View
B
Retailer 7
-
£1,744 GBP
SGD 3,157 SGD
View
B
Retailer 8
-
£1,756 GBP
$2,353 USD
View
B
Retailer 9
-
£1,769 GBP
$2,370 USD
View
B
Retailer 10
-
£1,790 GBP
$2,399 USD
View
B
Retailer 11
-
£1,851 GBP
View
B
Retailer 12
-
£2,106 GBP
€2,688 EUR
View
Most Expensive
B
MOH London
34C784D58 · Nov 1
£2,954 GBP
View
12 more retailers have this diamond
Prices start from £1,251 GBPSave up to £1,703 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
1.23ct Cushion
£1,251 GBP