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 $840 USD
As of October 31, 2026
Save $2,510 USD (75%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $3,350 USD 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 $840 to $3,350, a $2,510 spread on the same certified stone. Brilliant Earth lists it at $3,350. 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: $3,350 USD|Low: $583 USD|High: $4,370 USD|Avg: $1,630 USD|-23.3%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 31, 2026
Retailer 5$663 USD
Retailer 6$710 USD
Retailer 2$840 USD
Retailer 4$1,032 USD
Retailer 8$1,093 USD
Retailer 7$1,098 USD
Retailer 3$3,098 USD
Brilliant Earth$3,350 USD

27 data points across 8 retailers

8 retailers$840 USD to $3,350 USD

Retailer 1
-
$663 USD
£522 GBP
Price last confirmed 14 days ago
Retailer 2
-
$710 USD
View
Price last confirmed 20 days ago
A
Retailer 3
-
$840 USD
View
Retailer 4
-
$1,032 USD
€983 EUR
View
Price last confirmed 7 days ago
B+
Retailer 5
-
$1,093 USD
View
A
Retailer 6
-
$1,098 USD
View
B
Retailer 7
-
$3,098 USD
£2,439 GBP
View
Most Expensive
B
Brilliant Earth
11882359A · Oct 30
$3,350 USD
View
7 more retailers have this diamond
Prices start from $840 USDSave up to $2,510 USD

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
$840 USD