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Heart|Lab Grown|IGI

4.00ct F SI1 Heart Lab Grown Diamond

EX • F/SI1 • IGI LG603358151

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG603358151

Diamond specifications and retailer prices

From £454 GBP
As of November 6, 2026
Save £1,983 GBP (81%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £2,438 GBP at MOH London · As of November 5, 2026
View at MOH London

About this 4ct lab-grown heart diamond

This 4ct lab-grown heart sits in the three to five carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG603358151 or 603358151. Listed at 15 retailers as of November 5, 2026, with prices from £454 to £2,438, a £1,983 spread on the same certified stone. MOH London lists it at £2,438. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

4.00
Carat
F
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.3°
Pavilion angle42.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG603358151
Dimensions9.63 × 11.06 × 6.58 mm
L/W Ratio1.15
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
9.63 mm11.06 mm4.00 ctF / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG603358151
Side View
Table 59.0%Crown 33.3°Girdle: MED-THKPavilion 42.1°Culet: NoneDepth 59.5%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £2,438 GBP|Low: £436 GBP|High: £2,474 GBP|Avg: £1,027 GBP|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 7£454 GBP
Retailer 11£509 GBP
Retailer 12£509 GBP
Retailer 8£563 GBP
Retailer 5£661 GBP
Retailer 4£849 GBP
Retailer 10£863 GBP
Retailer 2£870 GBP
Retailer 6£1,397 GBP
Retailer 9£1,481 GBP
Retailer 3£1,777 GBP
MOH London£2,438 GBP

45 data points across 12 retailers

15 retailers£454 GBP to £2,438 GBP

A
Cheapest Retailer
-
£454 GBP
A
Retailer 2
-
£509 GBP
View
Final sale: no returns
A
Retailer 3
-
£509 GBP
View
A
Retailer 4
-
£563 GBP
View
Retailer 5
-
£563 GBP
View
Price last confirmed 22 days ago
A
Retailer 6
-
£612 GBP
View
A
Retailer 7
-
£661 GBP
View
B+
Retailer 8
-
£849 GBP
View
B+
Retailer 9
-
£863 GBP
View
B+
Retailer 10
-
£870 GBP
View
B+
Retailer 11
-
£879 GBP
View
B
Retailer 12
-
£1,397 GBP
View
B
Retailer 13
-
£1,481 GBP
View
B
Retailer 14
-
£1,777 GBP
View
Most Expensive
B
MOH London
LG603358151 · Nov 5
£2,438 GBP
View
14 more retailers have this diamond
Prices start from £454 GBPSave up to £1,983 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
4.00ct Heart
£454 GBP