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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 $422 NZD
As of November 6, 2026
Save $1,108 NZD (72%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $1,530 NZD 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 $422 to $1,530, a $1,108 spread on the same certified stone. MOH London lists it at $1,530. 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
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $1,530 NZD|Low: $296 NZD|High: $1,530 NZD|Avg: $770 NZD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 5$296 NZD
Retailer 2$422 NZD
Retailer 8$447 NZD
Retailer 7$718 NZD
Retailer 6$788 NZD
Retailer 4$920 NZD
Retailer 3$1,209 NZD
MOH London$1,530 NZD

7 data points across 8 retailers

7 retailers$422 NZD to $1,530 NZD

A
Cheapest Retailer
-
$422 NZD
B+
Retailer 2
-
$447 NZD
View
A
Retailer 3
-
$718 NZD
View
B+
Retailer 4
-
$788 NZD
View
B+
Retailer 5
-
$920 NZD
View
B+
Retailer 6
-
$1,209 NZD
View
Most Expensive
B
MOH London
LG850681876 · Nov 4
$1,530 NZD
£668 GBP
View
6 more retailers have this diamond
Prices start from $422 NZDSave up to $1,108 NZD

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
$422 NZD