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Marquise|Lab Grown|IGI

1.09ct G SI1 Marquise Lab Grown Diamond

VG • G/SI1 • IGI LG839666703

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG839666703

Diamond specifications and retailer prices

From $284 USD
£223 GBP
As of November 1, 2026
Save $1,115 USD (80%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $1,398 USD at MOH London · As of November 1, 2026
View at MOH London

About this 1.09ct lab-grown marquise diamond

This 1.09ct lab-grown marquise sits in the classic one-carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG839666703 or 839666703. Listed at 5 retailers as of November 1, 2026, with prices from $284 to $1,398, a $1,115 spread on the same certified stone. MOH London lists it at $1,398. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.09
Carat
G
Color
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.5°
Pavilion angle40°
OriginLab Grown
Grading LabIGI
CertificateIGI LG839666703
Dimensions10.95 × 5.17 × 3.29 mm
L/W Ratio2.12
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.95 mm5.17 mm1.09 ctG / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG839666703
Side View
Table 62.0%Crown 38.5°Girdle: MED-STKPavilion 40°Culet: NoneDepth 63.6%

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: $1,398 USD|Low: $274 USD|High: $1,412 USD|Avg: $523 USD|-1.0%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 1, 2026
Retailer 2$284 USD
Retailer 5$315 USD
Retailer 3$318 USD
Retailer 4$321 USD
MOH London$1,398 USD

19 data points across 5 retailers

5 retailers$284 USD to $1,398 USD

A
Cheapest Retailer
-
$284 USD
£223 GBP
B+
Retailer 2
-
$315 USD
View
A
Retailer 3
-
$318 USD
£250 GBP
View
A
Retailer 4
-
$321 USD
View
Most Expensive
B
MOH London
LG839666703 · Nov 1
$1,398 USD
£1,101 GBP
View
4 more retailers have this diamond
Prices start from $284 USDSave up to $1,115 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
1.09ct Marquise
$284 USD