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Marquise|Lab Grown|IGI

3.90ct G VS1 Marquise Lab Grown Diamond

EX • G/VS1 • IGI LG844626484

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG844626484

Diamond specifications and retailer prices

From £387 GBP
$519 USD
As of November 1, 2026
Save £1,564 GBP (80%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £1,952 GBP at Rare Carat · As of October 28, 2026
View at Rare Carat

About this 3.9ct lab-grown marquise diamond

This 3.9ct lab-grown marquise sits in the three to five carat band, graded G colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG844626484 or 844626484. Listed at 3 retailers as of October 28, 2026, with prices from £387 to £1,952, a £1,564 spread on the same certified stone. Rare Carat lists it at £1,952. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

3.90
Carat
G
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.3°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG844626484
Dimensions16.00 × 8.19 × 5.21 mm
L/W Ratio1.95
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
16.00 mm8.19 mm3.90 ctG / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG844626484
Side View
Table 60.0%Crown 35.3°Girdle: MED-STKPavilion 40.4°Culet: NoneDepth 63.6%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 1
Current: £1,952 GBP|Low: £387 GBP|High: £1,952 GBP|Avg: £1,032 GBP
Rare Carat
Retailer 2
Retailer 3
November 1, 2026
Retailer 3£387 GBP
Retailer 2£738 GBP
Rare Carat£1,952 GBP

19 data points across 3 retailers

3 retailers£387 GBP to £1,952 GBP

A
Cheapest Retailer
-
£387 GBP
$519 USD
Final sale: no returns
A
Retailer 2
-
£738 GBP
View
Most Expensive
B
Rare Carat
844626484 · Oct 28
£1,952 GBP
$2,615 USD
View
2 more retailers have this diamond
Prices start from £387 GBPSave up to £1,564 GBP

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
3.90ct Marquise
£387 GBP