Marquise|Lab Grown|IGI

1.23ct E SI1 Marquise Lab Grown Diamond

ID • E/SI1 • IGI LG733544094

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG733544094

Diamond specifications and retailer prices

From €346 EUR
$386 USD
As of November 1, 2026
Save €566 EUR (62%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: €912 EUR at MOH London · As of October 29, 2026
View at MOH London

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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG733544094 or 733544094. Listed at 7 retailers as of October 29, 2026, with prices from €346 to €912, a €566 spread on the same certified stone. MOH London lists it at €912. 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
E
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle39.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG733544094
Dimensions11.29 × 5.49 × 3.42 mm
L/W Ratio2.06
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.29 mm5.49 mm1.23 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG733544094
Side View
Table 60.0%Crown 36.5°Girdle: MED-STKPavilion 39.7°Culet: NoneDepth 62.3%

Caratlytics Score

How it works →
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 1
Current: €912 EUR|Low: €286 EUR|High: €917 EUR|Avg: €466 EUR|-0.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 1, 2026
Retailer 5€346 EUR
Retailer 3€346 EUR
Retailer 2€347 EUR
Retailer 6€367 EUR
Retailer 4€484 EUR
Retailer 7€586 EUR
MOH London€912 EUR

33 data points across 7 retailers

7 retailers€346 EUR to €912 EUR

A
Cheapest Retailer
-
€346 EUR
$386 USD
A
Retailer 2
-
€346 EUR
View
A
Retailer 3
-
€347 EUR
£306 GBP
View
A
Retailer 4
-
€367 EUR
$410 USD
View
B+
Retailer 5
-
€484 EUR
$541 USD
View
Retailer 6
-
€586 EUR
$655 USD
View
Price last confirmed 37 days ago
Most Expensive
B
MOH London
LG733544094 · Oct 29
€912 EUR
£802 GBP
View
6 more retailers have this diamond
Prices start from €346 EURSave up to €566 EUR

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
€346 EUR