Radiant|Lab Grown|IGI

1.05ct E SI1 Radiant Lab Grown Diamond

ID • E/SI1 • IGI LG644499133

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

Certificate IGI LG644499133

Diamond specifications and retailer prices

From $191 USD
As of October 25, 2026
Save $702 USD (79%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $893 USD at MOH London · As of October 25, 2026
View at MOH London

About this 1.05ct lab-grown radiant diamond

This 1.05ct lab-grown radiant sits in the classic one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG644499133 or 644499133. Listed at 8 retailers as of October 25, 2026, with prices from $191 to $893, a $702 spread on the same certified stone. MOH London lists it at $893. 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

1.05
Carat
E
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle41.8°
Pavilion angle39.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG644499133
Dimensions5.73 × 5.72 × 3.88 mm
L/W Ratio1.00
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
5.73 mm5.72 mm1.05 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG644499133
Side View
Table 64.0%Crown 41.8°Girdle: MediumPavilion 39.1°Culet: NoneDepth 67.8%

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 25
Current: $893 USD|Low: $191 USD|High: $1,403 USD|Avg: $504 USD|-35.7%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 28, 2026
Retailer 3$191 USD
Retailer 5$249 USD
Retailer 4$324 USD
Retailer 7$348 USD
Retailer 2$362 USD
Retailer 9$478 USD
Retailer 6$511 USD
Retailer 8$590 USD
MOH London$893 USD

23 data points across 9 retailers

8 retailers$191 USD to $893 USD

A
Cheapest Retailer
-
$191 USD
A
Retailer 2
-
$249 USD
£196 GBP
View
Price last confirmed 12 days ago
A
Retailer 3
-
$324 USD
€309 EUR
View
B+
Retailer 4
-
$348 USD
View
A
Retailer 5
-
$362 USD
£285 GBP
View
B+
Retailer 6
-
$511 USD
View
B
Retailer 7
-
$695 USD
£547 GBP
View
Most Expensive
B
MOH London
LG644499133 · Oct 25
$893 USD
£703 GBP
View
7 more retailers have this diamond
Prices start from $191 USDSave up to $702 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
1.05ct Radiant
$191 USD