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Marquise|Lab Grown|IGI

1.40ct E SI1 Marquise Lab Grown Diamond

EX • E/SI1 • IGI LG788602868

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG788602868

Diamond specifications and retailer prices

From $703 AUD
£388 GBP
As of November 5, 2026
1 retailer carries this diamond
Only listing: $703 AUD at Diamond Quarter
Only one retailer lists this diamond right now, and it is shown above, so there is nothing to unlock. Similar diamonds are carried by several retailers.
View at Diamond Quarter

About this 1.4ct lab-grown marquise diamond

This 1.4ct lab-grown marquise sits in the one-and-a-quarter to one-and-a-half carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG788602868 or 788602868. Listed at a single retailer as of November 5, 2026. If it later appears at another store, Carat Hunter will surface the price comparison automatically. 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

1.40
Carat
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.4°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG788602868
Dimensions11.61 × 5.87 × 3.64 mm
L/W Ratio1.98
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.61 mm5.87 mm1.40 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG788602868
Side View
Table 62.0%Crown 34.4°Girdle: MED-STKPavilion 40.9°Culet: NoneDepth 62.0%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 5
Current: $703 AUD|Low: $147 AUD|High: $2,286 AUD|Avg: $1,022 AUD
Diamond Quarter
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
August 26, 2026
Retailer 3$147 AUD
Retailer 6$446 AUD
Retailer 5$530 AUD
Diamond Quarter$703 AUD
Retailer 2$721 AUD
Retailer 7$746 AUD
Retailer 8$903 AUD
Retailer 10$1,150 AUD
Retailer 9$1,174 AUD
Retailer 4$1,429 AUD

61 data points across 10 retailers

1 retailer

B
Diamond Quarter
1.4SI1ELG522EECN · Nov 5
$703 AUD
£388 GBP
View

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
1.40ct Marquise
$703 AUD