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Marquise|Lab Grown|IGI

3.91ct G VS1 Marquise Lab Grown Diamond

EX • G/VS1 • IGI LG810641631

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG810641631

Diamond specifications and retailer prices

From £416 GBP
$558 USD
As of November 1, 2026
Save £2,309 GBP (85%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £2,725 GBP at Frank Darling · As of October 31, 2026
View at Frank Darling

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 VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG810641631 or 810641631. Listed at 5 retailers as of October 31, 2026, with prices from £416 to £2,725, a £2,309 spread on the same certified stone. Frank Darling lists it at £2,725. 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
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.6°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG810641631
Dimensions16.56 × 8.10 × 5.11 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
16.56 mm8.10 mm3.91 ctG / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG810641631
Side View
Table 59.0%Crown 35.6°Girdle: MED-STKPavilion 40.4°Culet: NoneDepth 63.1%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: £2,725 GBP|Low: £416 GBP|High: £2,725 GBP|Avg: £1,174 GBP|+0.0%
Frank Darling
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 28, 2026
Retailer 2£416 GBP
Retailer 4£581 GBP
Retailer 6£708 GBP
Retailer 5£1,513 GBP
Retailer 3£1,937 GBP
Frank Darling£2,725 GBP

15 data points across 6 retailers

5 retailers£416 GBP to £2,725 GBP

A
Cheapest Retailer
-
£416 GBP
$558 USD
Final sale: no returns
B+
Retailer 2
-
£581 GBP
$779 USD
View
B+
Retailer 3
-
£1,513 GBP
$2,027 USD
View
B+
Retailer 4
-
£1,937 GBP
$2,595 USD
View
Most Expensive
B
Frank Darling
100765882042KD · Oct 31
£2,725 GBP
$3,651 USD
View
4 more retailers have this diamond
Prices start from £416 GBPSave up to £2,309 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
£416 GBP