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Marquise|Lab Grown|IGI

1.23ct E VS1 Marquise Lab Grown Diamond

EX • E/VS1 • IGI LG790620208

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG790620208

Diamond specifications and retailer prices

From £160 GBP
$215 USD
As of October 30, 2026
Save £500 GBP (76%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £661 GBP at Frank Darling · As of October 29, 2026
View at Frank Darling

About this 1.23ct lab-grown marquise diamond

This 1.23ct lab-grown marquise sits in the classic one-carat band, graded E colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG790620208 or 790620208. Listed at 6 retailers as of October 29, 2026, with prices from £160 to £661, a £500 spread on the same certified stone. Frank Darling lists it at £661. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.23
Carat
E
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.7°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG790620208
Dimensions11.36 × 5.50 × 3.44 mm
L/W Ratio2.07
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.36 mm5.50 mm1.23 ctE / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG790620208
Side View
Table 61.0%Crown 36.7°Girdle: MED-STKPavilion 40.2°Culet: NoneDepth 62.5%

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: Oct 30
Current: £661 GBP|Low: £91 GBP|High: £860 GBP|Avg: £411 GBP|+1.9%
Frank Darling
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
October 28, 2026
Retailer 12£91 GBP
Retailer 2£160 GBP
Retailer 8£248 GBP
Retailer 3£288 GBP
Retailer 10£323 GBP
Retailer 5£333 GBP
Retailer 11£349 GBP
Retailer 9£376 GBP
Retailer 7£459 GBP
Retailer 4£511 GBP
Retailer 6£544 GBP
Retailer 13£597 GBP
Frank Darling£661 GBP
Retailer 14£860 GBP

17 data points across 14 retailers

6 retailers£160 GBP to £661 GBP

A
Cheapest Retailer
-
£160 GBP
$215 USD
Final sale: no returns
B+
Retailer 2
-
£248 GBP
$332 USD
View
Retailer 3
-
£376 GBP
$504 USD
View
Price last confirmed 9 days ago
B+
Retailer 4
-
£459 GBP
$615 USD
View
Retailer 5
-
£544 GBP
A$1,122 AUD
View
Price last confirmed 140 days ago
Most Expensive
B
Frank Darling
100757102493KD · Oct 29
£661 GBP
$885 USD
View
5 more retailers have this diamond
Prices start from £160 GBPSave up to £500 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 Marquise
£160 GBP