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Cushion|Lab Grown|IGI

1.23ct G VS1 Cushion Lab Grown Diamond

ID • G/VS1 • IGI LG763666423

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG763666423

Diamond specifications and retailer prices

From £510 GBP
As of November 4, 2026
Save £1,011 GBP (66%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £2,098 GBP at Taylor and Hart · As of November 4, 2026
View at Taylor and Hart

About this 1.23ct lab-grown cushion diamond

This 1.23ct lab-grown cushion sits in the classic one-carat band, graded G colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG763666423 or 763666423. Listed at 14 retailers as of October 31, 2026, with a 198% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.23
Carat
G
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.4°
Pavilion angle39.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG763666423
Dimensions7.73 × 5.44 × 3.46 mm
L/W Ratio1.42
Girdle conditionFaceted
Culet sizeLong Faceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.73 mm5.44 mm1.23 ctG / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG763666423
Side View
Table 55.0%Crown 38.4°Girdle: STK-THKPavilion 39.3°Culet: LONDepth 63.6%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: £2,454 GBP|Low: £510 GBP|High: £4,049 GBP|Avg: £1,400 GBP|-1.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Taylor and Hart
November 5, 2026
Retailer 4£510 GBP
Retailer 10£565 GBP
Retailer 3£661 GBP
Retailer 5£747 GBP
Retailer 7£762 GBP
Retailer 12£768 GBP
Retailer 6£926 GBP
Retailer 8£1,073 GBP
Retailer 9£1,522 GBP
Retailer 11£1,811 GBP
Retailer 2£1,854 GBP
Taylor and Hart£2,098 GBP
Retailer 1£2,454 GBP
Retailer 13£4,049 GBP

36 data points across 14 retailers

14 retailers£510 GBP to £1,522 GBP

B+
Cheapest Retailer
-
£510 GBP
Final sale: no returns
Retailer 2
-
£565 GBP
View
Price last confirmed 19 days ago
B
Retailer 3
-
£661 GBP
View
B
Retailer 4
-
£747 GBP
View
B
Retailer 5
-
£762 GBP
View
B
Retailer 6
-
£768 GBP
View
B
Retailer 7
-
£926 GBP
View
B
Retailer 8
-
£1,073 GBP
View
B
Retailer 9
-
£1,522 GBP
View
Retailer 10
-
£1,811 GBP
View
Price under review
Retailer 11
-
£1,854 GBP
View
Price under review
Most Expensive
Taylor and Hart
AF9W3YP · Nov 4
£2,098 GBP
$2,824 USD
View
Price under review
11 more retailers have this diamond
Prices start from £510 GBPSave up to £1,011 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.

B+
1.23ct Cushion
£510 GBP