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Marquise|Lab Grown|IGI

3.90ct G VS1 Marquise Lab Grown Diamond

EX • G/VS1 • IGI LG811657569

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG811657569

Diamond specifications and retailer prices

From £416 GBP
$557 USD
As of October 31, 2026
Save £2,303 GBP (85%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £2,718 GBP at Frank Darling · As of November 1, 2026
View at Frank Darling

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 LG811657569 or 811657569. Listed at 5 retailers as of October 31, 2026, with prices from £416 to £2,718, a £2,303 spread on the same certified stone. Frank Darling lists it at £2,718. 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°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG811657569
Dimensions16.42 × 8.41 × 5.03 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
16.42 mm8.41 mm3.90 ctG / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG811657569
Side View
Table 63.0%Crown 35°Girdle: MED-STKPavilion 40.3°Culet: NoneDepth 59.8%

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: Oct 31
Current: £2,718 GBP|Low: £416 GBP|High: £2,814 GBP|Avg: £1,308 GBP|+0.0%
Frank Darling
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 30, 2026
Retailer 5£416 GBP
Retailer 6£580 GBP
Retailer 9£646 GBP
Retailer 8£706 GBP
Retailer 3£803 GBP
Retailer 4£984 GBP
Retailer 12£1,070 GBP
Retailer 10£1,274 GBP
Retailer 7£1,509 GBP
Retailer 2£1,933 GBP
Frank Darling£2,718 GBP
Retailer 11£2,814 GBP

16 data points across 12 retailers

5 retailers£416 GBP to £2,718 GBP

A
Cheapest Retailer
-
£416 GBP
$557 USD
Final sale: no returns
B+
Retailer 2
-
£580 GBP
$777 USD
View
B+
Retailer 3
-
£1,509 GBP
$2,022 USD
View
Retailer 4
-
£1,933 GBP
$2,590 USD
View
Price last confirmed 7 days ago
Most Expensive
B
Frank Darling
100743475613KD · Nov 1
£2,718 GBP
$3,642 USD
View
4 more retailers have this diamond
Prices start from £416 GBPSave up to £2,303 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
£416 GBP