Radiant|Lab Grown|IGI

4.02ct D SI1 Radiant Lab Grown Diamond

ID • D/SI1 • IGI LG645412655

Shape and cutting style on the report: Cut cornered square modified brilliant

Certificate IGI LG645412655

Diamond specifications and retailer prices

From €752 EUR
$840 USD
As of October 31, 2026
Save €2,247 EUR (75%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: €2,999 EUR at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 4.02ct lab-grown radiant diamond

This 4.02ct lab-grown radiant sits in the three to five carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG645412655 or 645412655. Listed at 8 retailers as of October 30, 2026, with prices from €752 to €2,999, a €2,247 spread on the same certified stone. Brilliant Earth lists it at €2,999. 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
D
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.5°
Pavilion angle37.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG645412655
Dimensions8.88 × 8.80 × 5.94 mm
L/W Ratio1.01
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.88 mm8.80 mm4.02 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG645412655
Side View
Table 65.0%Crown 42.5°Girdle: MED-STKPavilion 37.3°Culet: NoneDepth 67.5%

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: Oct 31
Current: €2,999 EUR|Low: €522 EUR|High: €3,912 EUR|Avg: €1,459 EUR|-23.3%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 31, 2026
Retailer 5€593 EUR
Retailer 6€636 EUR
Retailer 3€752 EUR
Retailer 2€867 EUR
Retailer 8€978 EUR
Retailer 7€983 EUR
Retailer 4€2,773 EUR
Brilliant Earth€2,999 EUR

27 data points across 8 retailers

8 retailers€752 EUR to €2,999 EUR

Retailer 1
-
€593 EUR
£522 GBP
Price last confirmed 15 days ago
Retailer 2
-
€636 EUR
$710 USD
View
Price last confirmed 21 days ago
A
Retailer 3
-
€752 EUR
$840 USD
View
A
Retailer 4
-
€867 EUR
View
B+
Retailer 5
-
€978 EUR
$1,093 USD
View
A
Retailer 6
-
€983 EUR
$1,098 USD
View
B
Retailer 7
-
€2,773 EUR
£2,439 GBP
View
Most Expensive
B
Brilliant Earth
11882359A · Oct 30
€2,999 EUR
$3,350 USD
View
7 more retailers have this diamond
Prices start from €752 EURSave up to €2,247 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 Radiant
€752 EUR