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Round|Lab Grown|IGI

4.03ct E FL Round Lab Grown Diamond

ID • E/FL • IGI LG818658820

Shape and cutting style on the report: Round brilliant

Certificate IGI LG818658820

Diamond specifications and retailer prices

From £2,149 GBP
$2,879 USD
As of October 29, 2026
Save £6,535 GBP (75%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £8,684 GBP at Taylor and Hart · As of October 30, 2026
View at Taylor and Hart

About this 4.03ct lab-grown round diamond

This 4.03ct 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 LG818658820 or 818658820. Listed at 21 retailers as of October 29, 2026, with prices from £2,149 to £8,684, a £6,535 spread on the same certified stone. Taylor and Hart lists it at £8,684. 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

4.03
Carat
E
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.6°
Pavilion angle41.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818658820
Dimensions10.23 × 10.28 × 6.32 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
10.23 mm10.28 mm4.03 ctE / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818658820
Side View
Table 55.0%Crown 33.6°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 61.7%

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 29
Current: £3,354 GBP|Low: £2,149 GBP|High: £9,254 GBP|Avg: £4,174 GBP|-4.6%
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
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Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
Retailer 20
Taylor and Hart
October 31, 2026
Retailer 8£2,149 GBP
Retailer 14£2,338 GBP
Retailer 5£2,406 GBP
Retailer 16£2,454 GBP
Retailer 12£2,493 GBP
Retailer 19£2,493 GBP
Retailer 9£2,571 GBP
Retailer 13£2,656 GBP
Retailer 3£3,213 GBP
Retailer 15£3,226 GBP
Retailer 1£3,354 GBP
Retailer 2£3,426 GBP
Retailer 7£3,747 GBP
Retailer 18£3,969 GBP
Retailer 17£5,306 GBP
Retailer 11£5,362 GBP
Retailer 4£5,965 GBP
Retailer 6£6,530 GBP
Retailer 10£6,741 GBP
Retailer 20£6,933 GBP
Taylor and Hart£8,684 GBP

24 data points across 21 retailers

21 retailers£2,149 GBP to £8,684 GBP

A
Cheapest Retailer
-
£2,149 GBP
$2,879 USD
A
Retailer 2
-
£2,338 GBP
$3,132 USD
View
A
Retailer 3
-
£2,406 GBP
$3,224 USD
View
Final sale: no returns
A
Retailer 4
-
£2,454 GBP
View
A
Retailer 5
-
£2,493 GBP
$3,340 USD
View
A
Retailer 6
-
£2,493 GBP
$3,340 USD
View
A
Retailer 7
-
£2,571 GBP
$3,445 USD
View
Retailer 8
-
£2,656 GBP
$3,559 USD
View
Price last confirmed 20 days ago
A
Retailer 9
-
£3,213 GBP
$4,305 USD
View
A
Retailer 10
-
£3,226 GBP
$4,323 USD
View
A
Retailer 11
-
£3,354 GBP
View
A
Retailer 12
-
£3,426 GBP
$4,591 USD
View
A
Retailer 13
-
£3,747 GBP
$5,020 USD
View
A
Retailer 14
-
£3,969 GBP
€5,065 EUR
View
B+
Retailer 15
-
£5,306 GBP
ZAR 114,849 ZAR
View
Retailer 16
-
£5,362 GBP
$7,185 USD
View
Price last confirmed 13 days ago
B+
Retailer 17
-
£5,965 GBP
$7,992 USD
View
B+
Retailer 18
-
£6,530 GBP
$8,749 USD
View
B+
Retailer 19
-
£6,741 GBP
View
B+
Retailer 20
-
£6,933 GBP
$9,290 USD
View
Most Expensive
B
Taylor and Hart
YB4GNG4 · Oct 30
£8,684 GBP
$11,636 USD
View
20 more retailers have this diamond
Prices start from £2,149 GBPSave up to £6,535 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
4.03ct Round
£2,149 GBP