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Marquise|Lab Grown|IGI

3.90ct G VS1 Marquise Lab Grown Diamond

EX • G/VS1 • IGI LG844632504

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG844632504

Diamond specifications and retailer prices

From £373 GBP
$500 USD
As of November 1, 2026
Save £2,351 GBP (86%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £2,724 GBP at Brilliant Earth · As of October 26, 2026
View at Brilliant Earth

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 LG844632504 or 844632504. Listed at 4 retailers as of October 26, 2026, with prices from £373 to £2,724, a £2,351 spread on the same certified stone. Brilliant Earth lists it at £2,724. 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 angle35.1°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG844632504
Dimensions17.16 × 8.21 × 4.96 mm
L/W Ratio2.09
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
17.16 mm8.21 mm3.90 ctG / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG844632504
Side View
Table 62.0%Crown 35.1°Girdle: THN-MEDPavilion 40.3°Culet: NoneDepth 60.4%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 1
Current: £701 GBP|Low: £373 GBP|High: £1,948 GBP|Avg: £789 GBP|-1.3%
Retailer 1
Retailer 2
Retailer 3
November 2, 2026
Retailer 3£373 GBP
Retailer 1£701 GBP
Retailer 2£1,948 GBP

19 data points across 3 retailers

4 retailers£373 GBP to £2,724 GBP

A
Cheapest Retailer
-
£373 GBP
$500 USD
Final sale: no returns
A
Retailer 2
-
£701 GBP
View
B+
Retailer 3
-
£1,948 GBP
$2,610 USD
View
Most Expensive
B
Brilliant Earth
22149373A · Oct 26
£2,724 GBP
$3,650 USD
View
3 more retailers have this diamond
Prices start from £373 GBPSave up to £2,351 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
£373 GBP