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Marquise|Lab Grown|IGI

0.40ct F SI1 Marquise Lab Grown Diamond

ID • F/SI1 • IGI LG538276777

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG538276777

Diamond specifications and retailer prices

From $104 USD
As of October 30, 2026
Save $309 USD (75%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $1,073 USD at MOH London · As of November 1, 2026
View at MOH London

About this 0.4ct lab-grown marquise diamond

This 0.4ct lab-grown marquise sits in the sub-half-carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG538276777 or 538276777. Listed at 12 retailers as of October 30, 2026, with a 297% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

0.40
Carat
F
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.7°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG538276777
Dimensions7.80 × 3.84 × 2.41 mm
L/W Ratio2.03
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
7.80 mm3.84 mm0.40 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG538276777
Side View
Table 55.0%Crown 33.7°Girdle: MED-STKPavilion 40.3°Culet: NoneDepth 62.8%

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: Oct 30
Current: $1,073 USD|Low: $99 USD|High: $1,086 USD|Avg: $325 USD|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 1, 2026
Retailer 6$104 USD
Retailer 10$120 USD
Retailer 7$137 USD
Retailer 11$137 USD
Retailer 4$230 USD
Retailer 2$252 USD
Retailer 9$259 USD
Retailer 5$330 USD
Retailer 3$355 USD
Retailer 8$413 USD
MOH London$1,073 USD

44 data points across 11 retailers

12 retailers$104 USD to $413 USD

A
Cheapest Retailer
-
$104 USD
A
Retailer 2
-
$120 USD
View
A
Retailer 3
-
$137 USD
View
Retailer 4
-
$137 USD
View
Price last confirmed 8 days ago
B+
Retailer 5
-
$230 USD
View
B+
Retailer 6
-
$252 USD
£199 GBP
View
B+
Retailer 7
-
$259 USD
View
B+
Retailer 8
-
$330 USD
£260 GBP
View
B
Retailer 9
-
$355 USD
View
B
Retailer 10
-
$384 USD
HK$3,000 HKD
View
B
Retailer 11
-
$413 USD
View
Most Expensive
MOH London
LG538276777 · Nov 1
$1,073 USD
£845 GBP
View
Price under review
11 more retailers have this diamond
Prices start from $104 USDSave up to $309 USD

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
0.40ct Marquise
$104 USD