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Marquise|Lab Grown|IGI

4.00ct G VS1 Marquise Lab Grown Diamond

EX • G/VS1 • IGI LG818624239

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG818624239

Diamond specifications and retailer prices

From £482 GBP
$646 USD
As of November 1, 2026
Save £1,529 GBP (76%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £2,011 GBP at Rare Carat · As of November 1, 2026
View at Rare Carat

About this 4ct lab-grown marquise diamond

This 4ct 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 LG818624239 or 818624239. Listed at 5 retailers as of November 1, 2026, with prices from £482 to £2,011, a £1,529 spread on the same certified stone. Rare Carat lists it at £2,011. 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

4.00
Carat
G
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.6°
Pavilion angle41.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818624239
Dimensions15.55 × 8.30 × 5.35 mm
L/W Ratio1.87
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
15.55 mm8.30 mm4.00 ctG / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818624239
Side View
Table 61.0%Crown 35.6°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 64.5%

Caratlytics Score

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

Price History

Last verified: Nov 1
Current: £2,011 GBP|Low: £482 GBP|High: £3,560 GBP|Avg: £1,683 GBP|-1.1%
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 21, 2026
Retailer 2£482 GBP
Retailer 7£597 GBP
Retailer 3£671 GBP
Retailer 8£838 GBP
Retailer 5£1,735 GBP
Rare Carat£2,011 GBP
Retailer 4£2,960 GBP
Retailer 6£3,560 GBP

8 data points across 8 retailers

5 retailers£482 GBP to £2,011 GBP

A
Cheapest Retailer
-
£482 GBP
$646 USD
Final sale: no returns
Retailer 2
-
£671 GBP
$899 USD
View
Price last confirmed 12 days ago
Retailer 3
-
£1,735 GBP
$2,325 USD
View
Price last confirmed 13 days ago
B
Retailer 4
-
£2,004 GBP
$2,685 USD
View
Most Expensive
B
Rare Carat
JAY-17_l_847686352 · Nov 1
£2,011 GBP
$2,695 USD
View
4 more retailers have this diamond
Prices start from £482 GBPSave up to £1,529 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
4.00ct Marquise
£482 GBP