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Marquise|Lab Grown|IGI

4.05ct E IF Marquise Lab Grown Diamond

ID • E/IF • IGI LG817696109

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG817696109

Diamond specifications and retailer prices

From £2,681 GBP
$3,592 USD
As of October 31, 2026
Save £7,621 GBP (74%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £11,227 GBP at Novita Diamonds · As of October 8, 2026
View at Novita Diamonds

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 IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG817696109 or 817696109. Listed at 17 retailers as of October 31, 2026, with a 284% 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

4.05
Carat
E
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.8°
Pavilion angle38.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG817696109
Dimensions16.31 × 8.38 × 5.01 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
16.31 mm8.38 mm4.05 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG817696109
Side View
Table 60.0%Crown 37.8°Girdle: MED-STKPavilion 38.8°Culet: NoneDepth 59.8%

Caratlytics Score

How it works →
A+
Exceptional
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: £9,711 GBP|Low: £2,681 GBP|High: £10,596 GBP|Avg: £5,524 GBP|-2.8%
Retailer 1
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
Retailer 16
October 31, 2026
Retailer 10£2,681 GBP
Retailer 14£2,799 GBP
Retailer 3£2,907 GBP
Retailer 11£3,693 GBP
Retailer 13£3,926 GBP
Retailer 7£4,038 GBP
Retailer 9£4,338 GBP
Retailer 4£4,834 GBP
Retailer 2£5,100 GBP
Retailer 16£5,937 GBP
Retailer 8£6,093 GBP
Retailer 6£6,679 GBP
Retailer 5£7,110 GBP
Retailer 12£9,359 GBP
Retailer 1£9,711 GBP
Retailer 15£10,302 GBP

17 data points across 16 retailers

17 retailers£2,681 GBP to £10,302 GBP

A+
Cheapest Retailer
-
£2,681 GBP
$3,592 USD
Final sale: no returns
A
Retailer 2
-
£2,799 GBP
$3,750 USD
View
A
Retailer 3
-
£2,907 GBP
$3,895 USD
View
A
Retailer 4
-
£3,693 GBP
View
A
Retailer 5
-
£3,926 GBP
$5,261 USD
View
A
Retailer 6
-
£4,038 GBP
$5,410 USD
View
A
Retailer 7
-
£4,338 GBP
$5,813 USD
View
A
Retailer 8
-
£4,834 GBP
View
A
Retailer 9
-
£5,100 GBP
€6,508 EUR
View
A
Retailer 10
-
£5,937 GBP
ZAR 128,519 ZAR
View
Retailer 11
-
£6,093 GBP
A$12,560 AUD
View
Price last confirmed 9 days ago
A
Retailer 12
-
£6,679 GBP
$8,949 USD
View
A
Retailer 13
-
£7,110 GBP
View
B+
Retailer 14
-
£9,359 GBP
SGD 16,946 SGD
View
B+
Retailer 15
-
£9,711 GBP
$13,012 USD
View
B+
Retailer 16
-
£10,302 GBP
$13,803 USD
View
Most Expensive
Novita Diamonds
cert_817696109 · Oct 8
£11,227 GBP
A$23,144 AUD
View
Price last confirmed 23 days ago
16 more retailers have this diamond
Prices start from £2,681 GBPSave up to £7,621 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
£2,681 GBP