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Marquise|Lab Grown|IGI

3.91ct G VVS2 Marquise Lab Grown Diamond

EX • G/VVS2 • IGI LG818627954

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG818627954

Diamond specifications and retailer prices

From £398 GBP
$533 USD
As of November 1, 2026
Save £363 GBP (48%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £3,030 GBP at Brilliant Earth · As of October 24, 2026
View at Brilliant Earth

About this 3.91ct lab-grown marquise diamond

This 3.91ct lab-grown marquise sits in the three to five carat band, graded G colour (near-colourless) and VVS2 clarity (very-very-slightly-included), with a top-tier cut grade and certified by IGI LG818627954 or 818627954. Listed at 4 retailers as of November 1, 2026, with a 91% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

3.91
Carat
G
Colour
VVS2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.8°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818627954
Dimensions16.79 × 8.22 × 5.06 mm
L/W Ratio2.04
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
16.79 mm8.22 mm3.91 ctG / VVS2
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818627954
Side View
Table 62.0%Crown 34.8°Girdle: MED-STKPavilion 40.5°Culet: NoneDepth 61.6%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 1
Current: £3,030 GBP|Low: £393 GBP|High: £3,030 GBP|Avg: £1,564 GBP
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
November 2, 2026
Retailer 3£398 GBP
Retailer 2£761 GBP
Retailer 4£2,280 GBP
Brilliant Earth£3,030 GBP

37 data points across 4 retailers

4 retailers£398 GBP to £761 GBP

A
Cheapest Retailer
-
£398 GBP
$533 USD
Final sale: no returns
A
Retailer 2
-
£761 GBP
View
Retailer 3
-
£2,280 GBP
$3,055 USD
View
Price last confirmed 14 days ago
Most Expensive
Brilliant Earth
21228203A · Oct 24
£3,030 GBP
$4,060 USD
View
Price last confirmed 8 days ago
3 more retailers have this diamond
Prices start from £398 GBPSave up to £363 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
3.91ct Marquise
£398 GBP