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Radiant|Lab Grown|IGI

1.21ct E SI1 Radiant Lab Grown Diamond

ID • E/SI1 • IGI LG850681876

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

Certificate IGI LG850681876

Diamond specifications and retailer prices

From $341 AUD
As of November 6, 2026
Save $894 AUD (72%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $1,235 AUD at MOH London · As of November 4, 2026
View at MOH London

About this 1.21ct lab-grown radiant diamond

This 1.21ct 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 LG850681876 or 850681876. Listed at 7 retailers as of November 4, 2026, with prices from $341 to $1,235, a $894 spread on the same certified stone. MOH London lists it at $1,235. 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

1.21
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle47.2°
Pavilion angle34.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG850681876
Dimensions7.47 × 5.26 × 3.56 mm
L/W Ratio1.42
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.47 mm5.26 mm1.21 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG850681876
Side View
Table 66.0%Crown 47.2°Girdle: Slightly ThickPavilion 34.9°Culet: NoneDepth 67.7%

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: Nov 6
Current: $1,235 AUD|Low: $239 AUD|High: $1,235 AUD|Avg: $622 AUD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 5$239 AUD
Retailer 2$341 AUD
Retailer 8$361 AUD
Retailer 7$579 AUD
Retailer 6$636 AUD
Retailer 4$742 AUD
Retailer 3$975 AUD
MOH London$1,235 AUD

7 data points across 8 retailers

7 retailers$341 AUD to $1,235 AUD

A
Cheapest Retailer
-
$341 AUD
B+
Retailer 2
-
$361 AUD
View
A
Retailer 3
-
$579 AUD
View
B+
Retailer 4
-
$636 AUD
View
B+
Retailer 5
-
$742 AUD
View
B+
Retailer 6
-
$975 AUD
View
Most Expensive
B
MOH London
LG850681876 · Nov 4
$1,235 AUD
£668 GBP
View
6 more retailers have this diamond
Prices start from $341 AUDSave up to $894 AUD

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
1.21ct Radiant
$341 AUD