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Round|Lab Grown|IGI

1.54ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG779631721

Shape and cutting style on the report: Round brilliant

Certificate IGI LG779631721

Diamond specifications and retailer prices

From £336 GBP
As of November 4, 2026
Save £132 GBP (28%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £843 GBP at MOH London · As of October 25, 2026
View at MOH London

About this 1.54ct lab-grown round diamond

This 1.54ct lab-grown round 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 LG779631721 or 779631721. Listed at 11 retailers as of November 4, 2026, with a 39% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.54
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.2°
Pavilion angle41.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG779631721
Dimensions7.45 × 7.51 × 4.55 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.45 mm7.51 mm1.54 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG779631721
Side View
Table 59.0%Crown 33.2°Girdle: THN-MEDPavilion 41.2°Culet: NoneDepth 60.9%

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 4
Current: £843 GBP|Low: £146 GBP|High: £1,100 GBP|Avg: £580 GBP|-15.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
October 29, 2026
Retailer 14£146 GBP
Retailer 9£255 GBP
Retailer 10£256 GBP
Retailer 2£296 GBP
Retailer 11£312 GBP
Retailer 8£325 GBP
Retailer 12£336 GBP
Retailer 7£467 GBP
Retailer 5£579 GBP
Retailer 4£707 GBP
Retailer 3£739 GBP
Retailer 13£833 GBP
MOH London£843 GBP
Retailer 6£1,100 GBP

36 data points across 14 retailers

11 retailers£336 GBP to £467 GBP

Retailer 1
-
£255 GBP
Price last confirmed 10 days ago
Retailer 2
-
£256 GBP
View
Price last confirmed 11 days ago
Retailer 3
-
£296 GBP
View
Price last confirmed 8 days ago
Retailer 4
-
£325 GBP
View
Price last confirmed 9 days ago
A
Retailer 5
-
£336 GBP
View
B+
Retailer 6
-
£467 GBP
View
Retailer 7
-
£579 GBP
View
Price last confirmed 10 days ago
Retailer 8
-
£707 GBP
View
Price last confirmed 9 days ago
Retailer 9
-
£739 GBP
View
Price last confirmed 9 days ago
Retailer 10
-
£833 GBP
View
Price last confirmed 9 days ago
Most Expensive
MOH London
LG779631721 · Oct 25
£843 GBP
View
Price last confirmed 11 days ago
10 more retailers have this diamond
Prices start from £336 GBPSave up to £132 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
1.54ct Round
£336 GBP