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Radiant|Lab Grown|IGI

1.21ct E SI1 Radiant Lab Grown Diamond

VG • E/SI1 • IGI LG478127998

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

Certificate IGI LG478127998

Diamond specifications and retailer prices

From €350 EUR
As of November 6, 2026
2 retailers carry this diamond
Most expensive: €1,043 EUR at MOH London · As of October 29, 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 very-good cut grade and certified by IGI LG478127998 or 478127998. Listed at 2 retailers as of November 6, 2026. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.21
Carat
E
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabIGI
CertificateIGI LG478127998
Dimensions7.38 × 5.26 × 3.75 mm
L/W Ratio1.40
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) process.
Top View
7.38 mm5.26 mm1.21 ctE / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG478127998
Side View
Table 60.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 71.3%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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Price History

Last verified: Nov 6
Current: €1,043 EUR|Low: €333 EUR|High: €1,050 EUR|Avg: €545 EUR|-0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 4, 2026
Retailer 2€350 EUR
Retailer 6€373 EUR
Retailer 4€386 EUR
Retailer 5€463 EUR
Retailer 3€700 EUR
MOH London€1,043 EUR

11 data points across 6 retailers

2 retailers

B+
Cheapest Retailer
-
€350 EUR
Most Expensive
MOH London
LG478127998 · Oct 29
€1,043 EUR
£917 GBP
View
Price last confirmed 8 days ago
1 more retailer has this diamond
Prices start from €350 EUR

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.

B+
1.21ct Radiant
€350 EUR