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Marquise|Lab Grown|IGI

4.18ct E FL Marquise Lab Grown Diamond

EX • E/FL • IGI LG817652523

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG817652523

Diamond specifications and retailer prices

From £6,276 GBP
$8,409 USD
As of October 31, 2026
Save £10,574 GBP (63%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £19,354 GBP at Wholesale Diamonds Direct · As of October 24, 2026
View at Wholesale Diamonds Direct

About this 4.18ct lab-grown marquise diamond

This 4.18ct lab-grown marquise sits in the three to five carat band, graded E colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG817652523 or 817652523. Listed at 11 retailers as of October 31, 2026, with a 168% 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

4.18
Carat
E
Colour
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.1°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG817652523
Dimensions16.24 × 8.60 × 5.18 mm
L/W Ratio1.89
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
16.24 mm8.60 mm4.18 ctE / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG817652523
Side View
Table 60.0%Crown 34.1°Girdle: MED-STKPavilion 40.3°Culet: NoneDepth 60.2%

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: £12,113 GBP|Low: £6,276 GBP|High: £37,349 GBP|Avg: £13,629 GBP|-1.6%
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
Retailer 18
Wholesale Diamonds Direct
October 18, 2026
Retailer 12£6,276 GBP
Retailer 18£6,565 GBP
Retailer 11£6,783 GBP
Retailer 7£7,351 GBP
Retailer 14£8,471 GBP
Retailer 4£8,602 GBP
Retailer 3£9,131 GBP
Retailer 6£10,635 GBP
Retailer 15£11,667 GBP
Retailer 16£11,716 GBP
Retailer 1£12,113 GBP
Retailer 5£13,425 GBP
Retailer 2£13,667 GBP
Retailer 17£15,843 GBP
Retailer 13£16,850 GBP
Wholesale Diamonds Direct£19,354 GBP
Retailer 10£20,658 GBP
Retailer 8£23,560 GBP
Retailer 9£37,349 GBP

16 data points across 19 retailers

11 retailers£6,276 GBP to £16,850 GBP

A
Cheapest Retailer
-
£6,276 GBP
$8,409 USD
Retailer 2
-
£6,565 GBP
$8,797 USD
View
Price last confirmed 30 days ago
A
Retailer 3
-
£6,783 GBP
CA$12,624 CAD
View
A
Retailer 4
-
£8,471 GBP
$11,350 USD
View
B+
Retailer 5
-
£11,667 GBP
$15,632 USD
View
B+
Retailer 6
-
£12,113 GBP
$16,230 USD
View
Retailer 7
-
£12,680 GBP
$16,990 USD
View
Price last confirmed 27 days ago
Retailer 8
-
£13,667 GBP
View
Price last confirmed 32 days ago
Retailer 9
-
£15,843 GBP
ZAR 342,941 ZAR
View
Price last confirmed 30 days ago
B
Retailer 10
-
£16,850 GBP
$22,577 USD
View
Most Expensive
Wholesale Diamonds Direct
475659898 · Oct 24
£19,354 GBP
$25,933 USD
View
Price last confirmed 9 days ago
10 more retailers have this diamond
Prices start from £6,276 GBPSave up to £10,574 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
4.18ct Marquise
£6,276 GBP