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Marquise|Lab Grown|IGI

4.01ct E IF Marquise Lab Grown Diamond

ID • E/IF • IGI LG690509443

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG690509443

Diamond specifications and retailer prices

From £4,139 GBP
$5,546 USD
As of October 30, 2026
Save £12,832 GBP (76%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: £16,971 GBP at Taylor and Hart · As of October 30, 2026
View at Taylor and Hart

About this 4.01ct lab-grown marquise diamond

This 4.01ct 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 LG690509443 or 690509443. Listed at 23 retailers as of October 30, 2026, with prices from £4,139 to £16,971, a £12,832 spread on the same certified stone. Taylor and Hart lists it at £16,971. 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

4.01
Carat
E
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle31.5°
Pavilion angle39.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG690509443
Dimensions17.57 × 8.38 × 4.92 mm
L/W Ratio2.10
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
17.57 mm8.38 mm4.01 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG690509443
Side View
Table 60.0%Crown 31.5°Girdle: MED-STKPavilion 39.4°Culet: NoneDepth 58.7%

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 30
Current: £9,143 GBP|Low: £3,311 GBP|High: £16,971 GBP|Avg: £7,720 GBP|-14.8%
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
Retailer 17
Taylor and Hart
October 30, 2026
Retailer 4£4,139 GBP
Retailer 6£4,442 GBP
Retailer 7£4,636 GBP
Retailer 5£4,802 GBP
Retailer 2£4,806 GBP
Retailer 17£5,594 GBP
Retailer 15£5,650 GBP
Retailer 11£6,145 GBP
Retailer 9£6,184 GBP
Retailer 16£6,273 GBP
Retailer 8£6,824 GBP
Retailer 12£8,000 GBP
Retailer 14£8,597 GBP
Retailer 1£9,143 GBP
Retailer 13£9,823 GBP
Retailer 10£10,220 GBP
Retailer 3£11,115 GBP
Taylor and Hart£16,971 GBP

40 data points across 18 retailers

23 retailers£4,139 GBP to £16,971 GBP

A
Cheapest Retailer
-
£4,139 GBP
$5,546 USD
A
Retailer 2
-
£4,338 GBP
$5,813 USD
View
A
Retailer 3
-
£4,442 GBP
$5,952 USD
View
A
Retailer 4
-
£4,636 GBP
$6,212 USD
View
Final sale: no returns
A
Retailer 5
-
£4,671 GBP
$6,258 USD
View
A
Retailer 6
-
£4,802 GBP
$6,434 USD
View
Retailer 7
-
£4,802 GBP
$6,434 USD
View
Price last confirmed 15 days ago
A
Retailer 8
-
£4,806 GBP
$6,440 USD
View
A
Retailer 9
-
£5,594 GBP
$7,495 USD
View
A
Retailer 10
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£5,650 GBP
$7,570 USD
View
A
Retailer 11
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£5,700 GBP
$7,638 USD
View
A
Retailer 12
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£6,145 GBP
View
Retailer 13
-
£6,273 GBP
$8,405 USD
View
Price last confirmed 10 days ago
A
Retailer 14
-
£6,824 GBP
View
A
Retailer 15
-
£8,000 GBP
€10,209 EUR
View
A
Retailer 16
-
£8,597 GBP
$11,519 USD
View
A
Retailer 17
-
£9,143 GBP
$12,250 USD
View
B+
Retailer 18
-
£9,823 GBP
View
B+
Retailer 19
-
£10,220 GBP
ZAR 221,216 ZAR
View
Retailer 20
-
£11,115 GBP
A$22,913 AUD
View
Price last confirmed 22 days ago
B
Retailer 21
-
£12,185 GBP
$16,326 USD
View
B+
Retailer 22
-
£13,355 GBP
$17,895 USD
View
Most Expensive
B
Taylor and Hart
54DGRTY · Oct 30
£16,971 GBP
$22,740 USD
View
22 more retailers have this diamond
Prices start from £4,139 GBPSave up to £12,832 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
4.01ct Marquise
£4,139 GBP