Marquise|Lab Grown|IGI

4.05ct E VS1 Marquise Lab Grown Diamond

VG • E/VS1 • IGI LG831618905

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG831618905

Diamond specifications and retailer prices

From £524 GBP
As of October 29, 2026
Save £1,859 GBP (78%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £6,638 GBP at Brilliant Earth · As of October 22, 2026
View at Brilliant Earth

About this 4.05ct lab-grown marquise diamond

This 4.05ct lab-grown marquise sits in the three to five carat band, graded E colour (colourless) and VS1 clarity (very-slightly-included), with a very-good cut grade and certified by IGI LG831618905 or 831618905. Listed at 17 retailers as of October 29, 2026, with a 355% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

4.05
Carat
E
Colour
VS1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.2°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG831618905
Dimensions16.01 × 8.28 × 5.28 mm
L/W Ratio1.93
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
16.01 mm8.28 mm4.05 ctE / VS1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG831618905
Side View
Table 60.0%Crown 34.2°Girdle: STK-THKPavilion 40.7°Culet: NoneDepth 63.8%

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: Oct 29
Current: £6,638 GBP|Low: £520 GBP|High: £6,638 GBP|Avg: £1,663 GBP
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
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Retailer 17
October 29, 2026
Retailer 11£524 GBP
Retailer 9£583 GBP
Retailer 4£736 GBP
Retailer 2£964 GBP
Retailer 17£981 GBP
Retailer 13£1,038 GBP
Retailer 12£1,284 GBP
Retailer 14£1,300 GBP
Retailer 8£1,345 GBP
Retailer 15£1,486 GBP
Retailer 16£1,877 GBP
Retailer 3£1,981 GBP
Retailer 6£2,058 GBP
Retailer 7£2,081 GBP
Retailer 10£2,382 GBP
Retailer 5£2,400 GBP
Brilliant Earth£6,638 GBP

22 data points across 17 retailers

17 retailers£524 GBP to £2,382 GBP

A
Cheapest Retailer
-
£524 GBP
A
Retailer 2
-
£583 GBP
$776 USD
View
Final sale: no returns
A
Retailer 3
-
£736 GBP
$980 USD
View
A
Retailer 4
-
£964 GBP
View
A
Retailer 5
-
£981 GBP
$1,306 USD
View
A
Retailer 6
-
£1,038 GBP
€1,316 EUR
View
A
Retailer 7
-
£1,284 GBP
ZAR 27,632 ZAR
View
Retailer 8
-
£1,300 GBP
A$2,664 AUD
View
Price last confirmed 9 days ago
B+
Retailer 9
-
£1,345 GBP
$1,791 USD
View
B+
Retailer 10
-
£1,486 GBP
$1,979 USD
View
B
Retailer 11
-
£1,877 GBP
View
B+
Retailer 12
-
£1,981 GBP
$2,638 USD
View
B+
Retailer 13
-
£2,058 GBP
$2,740 USD
View
B+
Retailer 14
-
£2,081 GBP
$2,771 USD
View
B
Retailer 15
-
£2,382 GBP
View
Retailer 16
-
£2,400 GBP
A$4,917 AUD
View
Price last confirmed 21 days ago
Most Expensive
Brilliant Earth
21799680A · Oct 22
£6,638 GBP
$8,840 USD
View
Price last confirmed 7 days ago
16 more retailers have this diamond
Prices start from £524 GBPSave up to £1,859 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
4.05ct Marquise
£524 GBP