Radiant|Lab Grown|IGI

0.42ct G SI1 Radiant Lab Grown Diamond

ID • G/SI1 • IGI LG541251082

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

Certificate IGI LG541251082

Diamond specifications and retailer prices

From $107 USD
As of October 27, 2026
Save $321 USD (75%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $1,113 USD at MOH London · As of October 25, 2026
View at MOH London

About this 0.42ct lab-grown radiant diamond

This 0.42ct lab-grown radiant sits in the sub-half-carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG541251082 or 541251082. Listed at 12 retailers as of October 27, 2026, with a 300% 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

0.42
Carat
G
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.4°
Pavilion angle36.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG541251082
Dimensions5.22 × 3.72 × 2.60 mm
L/W Ratio1.40
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
5.22 mm3.72 mm0.42 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG541251082
Side View
Table 68.0%Crown 38.4°Girdle: STK-THKPavilion 36.5°Culet: NoneDepth 69.9%

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 27
Current: $1,113 USD|Low: $103 USD|High: $1,124 USD|Avg: $331 USD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 28, 2026
Retailer 5$107 USD
Retailer 10$124 USD
Retailer 7$142 USD
Retailer 11$142 USD
Retailer 4$263 USD
Retailer 8$266 USD
Retailer 6$300 USD
Retailer 2$321 USD
Retailer 3$359 USD
Retailer 9$428 USD
MOH London$1,113 USD

40 data points across 11 retailers

12 retailers$107 USD to $428 USD

A
Cheapest Retailer
-
$107 USD
A
Retailer 2
-
$124 USD
View
A
Retailer 3
-
$142 USD
View
A
Retailer 4
-
$142 USD
View
B+
Retailer 5
-
$263 USD
£207 GBP
View
B+
Retailer 6
-
$266 USD
View
B+
Retailer 7
-
$300 USD
View
B+
Retailer 8
-
$321 USD
£253 GBP
View
B
Retailer 9
-
$359 USD
View
B+
Retailer 10
-
$384 USD
HK$3,000 HKD
View
B
Retailer 11
-
$428 USD
View
Most Expensive
B
MOH London
LG541251082 · Oct 25
$1,113 USD
£876 GBP
View
Price under review
11 more retailers have this diamond
Prices start from $107 USDSave up to $321 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
0.42ct Radiant
$107 USD