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Cushion|Lab Grown|IGI

1.23ct D IF Cushion Lab Grown Diamond

GD • D/IF • IGI LG738504423

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG738504423

Diamond specifications and retailer prices

From £331 GBP
As of November 4, 2026
Save £1,103 GBP (77%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £1,434 GBP at MOH London · As of November 3, 2026
View at MOH London

About this 1.23ct lab-grown cushion diamond

This 1.23ct lab-grown cushion sits in the classic one-carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a standard cut grade and certified by IGI LG738504423 or 738504423. Listed at 16 retailers as of November 3, 2026, with prices from £331 to £1,434, a £1,103 spread on the same certified stone. MOH London lists it at £1,434. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.23
Carat
D
Colour
IF
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.1°
Pavilion angle35.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG738504423
Dimensions7.63 × 5.28 × 3.44 mm
L/W Ratio1.45
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.63 mm5.28 mm1.23 ctD / IF
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG738504423
Side View
Table 64.0%Crown 36.1°Girdle: MED-STKPavilion 35.1°Culet: NoneDepth 65.2%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: £1,434 GBP|Low: £331 GBP|High: £1,615 GBP|Avg: £811 GBP|-11.2%
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
November 4, 2026
Retailer 3£331 GBP
Retailer 16£367 GBP
Retailer 2£376 GBP
Retailer 11£478 GBP
Retailer 14£493 GBP
Retailer 5£594 GBP
Retailer 9£596 GBP
Retailer 4£624 GBP
Retailer 10£632 GBP
Retailer 12£894 GBP
Retailer 7£1,072 GBP
Retailer 8£1,167 GBP
Retailer 13£1,185 GBP
Retailer 6£1,205 GBP
Retailer 15£1,355 GBP
MOH London£1,434 GBP

41 data points across 16 retailers

16 retailers£331 GBP to £1,434 GBP

A
Cheapest Retailer
-
£331 GBP
Final sale: no returns
Retailer 2
-
£367 GBP
View
Price last confirmed 10 days ago
A
Retailer 3
-
£376 GBP
View
A
Retailer 4
-
£478 GBP
View
A
Retailer 5
-
£493 GBP
View
B+
Retailer 6
-
£594 GBP
View
A
Retailer 7
-
£596 GBP
View
B+
Retailer 8
-
£624 GBP
View
A
Retailer 9
-
£632 GBP
View
B+
Retailer 10
-
£894 GBP
View
B
Retailer 11
-
£1,072 GBP
View
B
Retailer 12
-
£1,167 GBP
View
Retailer 13
-
£1,185 GBP
View
Price last confirmed 7 days ago
B
Retailer 14
-
£1,205 GBP
View
B
Retailer 15
-
£1,355 GBP
View
Most Expensive
B
MOH London
LG738504423 · Nov 3
£1,434 GBP
View
15 more retailers have this diamond
Prices start from £331 GBPSave up to £1,103 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
£331 GBP