Heart|Lab Grown|IGI

4.02ct E SI1 Heart Lab Grown Diamond

ID • E/SI1 • IGI LG670428266

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG670428266

Diamond specifications and retailer prices

From £365 GBP

As of October 27, 2026

Save £2,008 GBP (85%) vs most expensive(unlock to see where)

17 retailers carry this diamond

Most expensive: £2,373 GBP at Brilliant Earth · As of October 30, 2026

View at Brilliant Earth

About this 4.02ct lab-grown heart diamond

This 4.02ct lab-grown heart sits in the three to five carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG670428266 or 670428266. Listed at 17 retailers as of October 27, 2026, with prices from £365 to £2,373, a £2,008 spread on the same certified stone. Brilliant Earth lists it at £2,373. 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

4.02

Carat

Colour

SI1

Clarity

Ideal

Cut

Specifications

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle35.6°

Pavilion angle40.5°

OriginLab Grown

Grading LabIGI

CertificateIGI LG670428266

Dimensions10.10 × 11.06 × 6.49 mm

L/W Ratio1.10

Girdle conditionFaceted

Culet sizePointed

Cert comments

This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa

View IGI Report →View Loupe360 Video →

Top View

OriginLab Grown

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

CertificateIGI LG670428266

Side View

Caratlytics Score

How it works →

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 27

Current: £2,373 GBP|Low: £342 GBP|High: £4,478 GBP|Avg: £990 GBP|-47.0%

Brilliant Earth

Retailer 2

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October 31, 2026

Retailer 4£352 GBP

Retailer 13£365 GBP

Retailer 10£393 GBP

Retailer 18£393 GBP

Retailer 5£436 GBP

Retailer 11£468 GBP

Retailer 17£541 GBP

Retailer 12£641 GBP

Retailer 7£681 GBP

Retailer 9£686 GBP

Retailer 14£719 GBP

Retailer 16£979 GBP

Retailer 6£1,017 GBP

Retailer 8£1,040 GBP

Retailer 2£1,363 GBP

Retailer 3£1,401 GBP

Retailer 15£1,603 GBP

Brilliant Earth£2,373 GBP

29 data points across 18 retailers

17 retailers£365 GBP to £2,373 GBP

Retailer 1

£352 GBP

$471 USD

Price last confirmed 7 days ago

Retailer 2

£365 GBP

View

Retailer 3

£393 GBP

$527 USD

View

Retailer 4

£436 GBP

$584 USD

View

Retailer 5

£468 GBP

HK$4,900 HKD

View

Retailer 6

£541 GBP

$725 USD

View

B+

Retailer 7

£641 GBP

€818 EUR

View

B+

Retailer 8

£681 GBP

$913 USD

View

B+

Retailer 9

£686 GBP

$919 USD

View

B+

Retailer 10

£719 GBP

View

B+

Retailer 11

£979 GBP

A$2,018 AUD

View

Retailer 12

£1,017 GBP

$1,363 USD

View

Retailer 13

£1,040 GBP

$1,394 USD

View

Retailer 14

£1,363 GBP

SGD 2,468 SGD

View

Retailer 15

£1,401 GBP

$1,877 USD

View

Retailer 16

£1,603 GBP

View

Most Expensive

Brilliant Earth

14415188A · Oct 30

£2,373 GBP

$3,180 USD

View

16 more retailers have this diamond

Prices start from £365 GBPSave up to £2,008 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.

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