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Round|Lab Grown|IGI

4.05ct E FL Round Lab Grown Diamond

ID • E/FL • IGI LG811634833

Shape and cutting style on the report: Round brilliant

Certificate IGI LG811634833

Diamond specifications and retailer prices

From £2,556 GBP
$3,425 USD
As of October 30, 2026
Save £7,937 GBP (76%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £10,493 GBP at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 4.05ct lab-grown round diamond

This 4.05ct lab-grown round 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 LG811634833 or 811634833. Listed at 14 retailers as of October 30, 2026, with prices from £2,556 to £10,493, a £7,937 spread on the same certified stone. Brilliant Earth lists it at £10,493. 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
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.1°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG811634833
Dimensions10.27 × 10.32 × 6.22 mm
L/W Ratio1.00
Girdle conditionFaceted
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
10.27 mm10.32 mm4.05 ctE / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG811634833
Side View
Table 58.0%Crown 34.1°Girdle: MediumPavilion 40.7°Culet: NoneDepth 60.4%

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: £10,493 GBP|Low: £2,556 GBP|High: £15,398 GBP|Avg: £6,668 GBP|-22.0%
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
October 31, 2026
Retailer 12£2,556 GBP
Retailer 3£3,095 GBP
Retailer 10£3,251 GBP
Retailer 7£3,416 GBP
Retailer 14£3,815 GBP
Retailer 2£4,044 GBP
Retailer 11£5,183 GBP
Retailer 8£5,402 GBP
Retailer 5£6,374 GBP
Retailer 9£6,467 GBP
Retailer 13£6,650 GBP
Retailer 6£8,840 GBP
Retailer 4£9,821 GBP
Brilliant Earth£10,493 GBP

43 data points across 14 retailers

14 retailers£2,556 GBP to £10,493 GBP

A
Cheapest Retailer
-
£2,556 GBP
$3,425 USD
A
Retailer 2
-
£3,095 GBP
HK$32,400 HKD
View
A
Retailer 3
-
£3,251 GBP
$4,356 USD
View
A
Retailer 4
-
£3,416 GBP
View
A
Retailer 5
-
£3,815 GBP
$5,112 USD
View
A
Retailer 6
-
£4,044 GBP
€5,161 EUR
View
Retailer 7
-
£5,183 GBP
$6,945 USD
View
Price last confirmed 13 days ago
B+
Retailer 8
-
£5,402 GBP
ZAR 116,936 ZAR
View
B+
Retailer 9
-
£6,374 GBP
$8,541 USD
View
B+
Retailer 10
-
£6,467 GBP
View
B+
Retailer 11
-
£6,650 GBP
$8,910 USD
View
B
Retailer 12
-
£8,840 GBP
$11,845 USD
View
B
Retailer 13
-
£9,821 GBP
$13,159 USD
View
Most Expensive
B
Brilliant Earth
21144075A · Oct 30
£10,493 GBP
$14,060 USD
View
13 more retailers have this diamond
Prices start from £2,556 GBPSave up to £7,937 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 Round
£2,556 GBP