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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 €422 EUR
$471 USD
As of October 23, 2026
Save €1,501 EUR (78%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: €2,846 EUR 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 23, 2026, with a 356% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
E
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
Top View
10.10 mm11.06 mm4.02 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG670428266
Side View
Table 58.0%Crown 35.6°Girdle: MED-STKPavilion 40.5°Culet: NoneDepth 58.7%

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 23
Current: €2,846 EUR|Low: €410 EUR|High: €5,371 EUR|Avg: €1,179 EUR|-47.0%
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
Retailer 15
Retailer 16
Retailer 17
Retailer 18
October 30, 2026
Retailer 18€422 EUR
Retailer 11€438 EUR
Retailer 10€471 EUR
Retailer 16€472 EUR
Retailer 3€523 EUR
Retailer 6€573 EUR
Retailer 15€649 EUR
Retailer 2€769 EUR
Retailer 5€817 EUR
Retailer 9€823 EUR
Retailer 12€862 EUR
Retailer 14€1,174 EUR
Retailer 4€1,220 EUR
Retailer 7€1,248 EUR
Retailer 8€1,655 EUR
Retailer 17€1,680 EUR
Retailer 13€1,922 EUR
Brilliant Earth€2,846 EUR

28 data points across 18 retailers

17 retailers€422 EUR to €1,922 EUR

A
Cheapest Retailer
-
€422 EUR
$471 USD
A
Retailer 2
-
€438 EUR
£385 GBP
View
A
Retailer 3
-
€472 EUR
$527 USD
View
A
Retailer 4
-
€523 EUR
$584 USD
View
A
Retailer 5
-
€573 EUR
HK$5,000 HKD
View
A
Retailer 6
-
€649 EUR
$725 USD
View
B+
Retailer 7
-
€769 EUR
View
B+
Retailer 8
-
€817 EUR
$913 USD
View
B+
Retailer 9
-
€823 EUR
$919 USD
View
B+
Retailer 10
-
€862 EUR
£758 GBP
View
B+
Retailer 11
-
€1,174 EUR
A$2,018 AUD
View
B
Retailer 12
-
€1,220 EUR
$1,363 USD
View
B
Retailer 13
-
€1,248 EUR
$1,394 USD
View
B
Retailer 14
-
€1,655 EUR
SGD 2,499 SGD
View
B
Retailer 15
-
€1,680 EUR
$1,877 USD
View
B
Retailer 16
-
€1,922 EUR
£1,691 GBP
View
Most Expensive
Brilliant Earth
14415188A · Oct 30
€2,846 EUR
$3,180 USD
View
Price under review
16 more retailers have this diamond
Prices start from €422 EURSave up to €1,501 EUR

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
4.02ct Heart
€422 EUR