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Round|Lab Grown|IGI

1.54ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG621455497

Shape and cutting style on the report: Round brilliant

Certificate IGI LG621455497

Diamond specifications and retailer prices

From £160 GBP
As of November 3, 2026
Save £633 GBP (80%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £793 GBP at MOH London · As of November 5, 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 LG621455497 or 621455497. Listed at 14 retailers as of November 3, 2026, with prices from £160 to £793, a £633 spread on the same certified stone. MOH London lists it at £793. 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 angle34°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG621455497
Dimensions7.48 × 7.42 × 4.52 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
HEARTS & ARROWS This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
7.48 mm7.42 mm1.54 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG621455497
Side View
Table 58.0%Crown 34°Girdle: MediumPavilion 40.7°Culet: NoneDepth 60.7%

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 3
Current: £793 GBP|Low: £138 GBP|High: £810 GBP|Avg: £397 GBP|-2.1%
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
Retailer 15
November 5, 2026
Retailer 12£160 GBP
Retailer 10£186 GBP
Retailer 9£198 GBP
Retailer 15£198 GBP
Retailer 8£308 GBP
Retailer 4£328 GBP
Retailer 5£340 GBP
Retailer 14£343 GBP
Retailer 2£363 GBP
Retailer 3£444 GBP
Retailer 13£637 GBP
Retailer 11£640 GBP
Retailer 7£661 GBP
Retailer 6£698 GBP
MOH London£793 GBP

38 data points across 15 retailers

14 retailers£160 GBP to £793 GBP

A
Cheapest Retailer
-
£160 GBP
A
Retailer 2
-
£186 GBP
View
A
Retailer 3
-
£198 GBP
View
Retailer 4
-
£198 GBP
View
Price last confirmed 12 days ago
A
Retailer 5
-
£308 GBP
View
A
Retailer 6
-
£328 GBP
View
B+
Retailer 7
-
£340 GBP
View
B+
Retailer 8
-
£363 GBP
View
B+
Retailer 9
-
£444 GBP
View
B
Retailer 10
-
£637 GBP
View
B
Retailer 11
-
£640 GBP
View
B
Retailer 12
-
£661 GBP
View
B
Retailer 13
-
£698 GBP
View
Most Expensive
B
MOH London
LG621455497 · Nov 5
£793 GBP
View
13 more retailers have this diamond
Prices start from £160 GBPSave up to £633 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
£160 GBP