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Round|Lab Grown|IGI

1.51ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG616409331

Shape and cutting style on the report: Round brilliant

Certificate IGI LG616409331

Diamond specifications and retailer prices

From £322 GBP
As of November 5, 2026
Save £1,118 GBP (78%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £1,470 GBP at MOH London · As of October 26, 2026
View at MOH London

About this 1.51ct lab-grown round diamond

This 1.51ct 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 LG616409331 or 616409331. Listed at 16 retailers as of November 1, 2026, with a 347% 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

1.51
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.4°
Pavilion angle41.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG616409331
Dimensions7.41 × 7.36 × 4.51 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
7.41 mm7.36 mm1.51 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG616409331
Side View
Table 60.0%Crown 34.4°GirdlePavilion 41.2°Culet: NoneDepth 61.1%

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 5
Current: £1,470 GBP|Low: £309 GBP|High: £1,485 GBP|Avg: £724 GBP|-1.0%
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
November 6, 2026
Retailer 10£322 GBP
Retailer 5£360 GBP
Retailer 11£361 GBP
Retailer 3£375 GBP
Retailer 2£400 GBP
Retailer 12£400 GBP
Retailer 4£629 GBP
Retailer 14£646 GBP
Retailer 7£651 GBP
Retailer 8£685 GBP
Retailer 13£1,121 GBP
Retailer 9£1,285 GBP
Retailer 6£1,441 GBP
MOH London£1,470 GBP

39 data points across 14 retailers

16 retailers£322 GBP to £1,441 GBP

A
Cheapest Retailer
-
£322 GBP
A
Retailer 2
-
£361 GBP
View
A
Retailer 3
-
£375 GBP
View
A
Retailer 4
-
£400 GBP
View
Retailer 5
-
£400 GBP
View
Price last confirmed 12 days ago
B+
Retailer 6
-
£505 GBP
View
B+
Retailer 7
-
£577 GBP
View
B
Retailer 8
-
£629 GBP
View
Retailer 9
-
£646 GBP
View
Price last confirmed 16 days ago
B
Retailer 10
-
£651 GBP
View
B
Retailer 11
-
£685 GBP
View
B
Retailer 12
-
£1,121 GBP
View
B
Retailer 13
-
£1,285 GBP
View
B
Retailer 14
-
£1,308 GBP
View
B
Retailer 15
-
£1,441 GBP
View
Most Expensive
MOH London
LG616409331 · Oct 26
£1,470 GBP
View
Price last confirmed 10 days ago
15 more retailers have this diamond
Prices start from £322 GBPSave up to £1,118 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 Round
£322 GBP