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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 $549 AUD
As of November 6, 2026
Save $896 AUD (62%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $1,444 AUD at MOH London · As of November 5, 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 November 5, 2026, with prices from $549 to $1,444, a $896 spread on the same certified stone. MOH London lists it at $1,444. 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
Colour
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 6
Current: $1,444 AUD|Low: $457 AUD|High: $1,464 AUD|Avg: $747 AUD|-1.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 2$549 AUD
Retailer 3$551 AUD
Retailer 5$551 AUD
Retailer 6$586 AUD
Retailer 4$773 AUD
Retailer 7$936 AUD
MOH London$1,444 AUD

38 data points across 7 retailers

7 retailers$549 AUD to $1,444 AUD

A
Cheapest Retailer
-
$549 AUD
A
Retailer 2
-
$551 AUD
View
Retailer 3
-
$551 AUD
View
Price last confirmed 10 days ago
A
Retailer 4
-
$586 AUD
View
B+
Retailer 5
-
$773 AUD
View
Retailer 6
-
$936 AUD
View
Price last confirmed 43 days ago
Most Expensive
B
MOH London
LG733544094 · Nov 5
$1,444 AUD
£796 GBP
View
6 more retailers have this diamond
Prices start from $549 AUDSave up to $896 AUD

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
$549 AUD