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Radiant|Lab Grown|IGI

1.51ct E SI1 Radiant Lab Grown Diamond

EX • E/SI1 • IGI LG833665579

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

Certificate IGI LG833665579

Diamond specifications and retailer prices

From £164 GBP
As of November 5, 2026
Save £613 GBP (79%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £776 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 1.51ct lab-grown radiant diamond

This 1.51ct lab-grown radiant sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG833665579 or 833665579. Listed at 9 retailers as of November 1, 2026, with prices from £164 to £776, a £613 spread on the same certified stone. MOH London lists it at £776. 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

1.51
Carat
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.3°
Pavilion angle34.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG833665579
Dimensions8.20 × 5.51 × 3.74 mm
L/W Ratio1.49
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.20 mm5.51 mm1.51 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG833665579
Side View
Table 63.0%Crown 43.3°Girdle: Slightly ThickPavilion 34.5°Culet: NoneDepth 67.9%

Caratlytics Score

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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 5
Current: £776 GBP|Low: £149 GBP|High: £828 GBP|Avg: £382 GBP|+3.2%
MOH London
Retailer 2
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Retailer 16
November 6, 2026
Retailer 4£149 GBP
Retailer 6£157 GBP
Retailer 5£159 GBP
Retailer 3£164 GBP
Retailer 2£211 GBP
Retailer 9£276 GBP
Retailer 14£280 GBP
Retailer 10£294 GBP
Retailer 8£332 GBP
Retailer 7£410 GBP
Retailer 12£493 GBP
Retailer 15£516 GBP
Retailer 11£578 GBP
Retailer 16£657 GBP
MOH London£776 GBP
Retailer 13£828 GBP

18 data points across 16 retailers

9 retailers£164 GBP to £776 GBP

Retailer 1
-
£157 GBP
Price last confirmed 39 days ago
A
Retailer 2
-
£164 GBP
View
Final sale: no returns
A
Retailer 3
-
£211 GBP
View
A
Retailer 4
-
£276 GBP
View
B+
Retailer 5
-
£294 GBP
View
Retailer 6
-
£516 GBP
View
Price last confirmed 38 days ago
B+
Retailer 7
-
£578 GBP
View
Retailer 8
-
£657 GBP
View
Price last confirmed 38 days ago
Most Expensive
B
MOH London
LG833665579 · Nov 1
£776 GBP
View
8 more retailers have this diamond
Prices start from £164 GBPSave up to £613 GBP

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
1.51ct Radiant
£164 GBP