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Round|Lab Grown|IGI

1.51ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG816614263

Shape and cutting style on the report: Round brilliant

Certificate IGI LG816614263

Diamond specifications and retailer prices

From £149 GBP
As of November 5, 2026
Save £718 GBP (83%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £867 GBP at MOH London · As of November 2, 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 F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG816614263 or 816614263. Listed at 14 retailers as of November 2, 2026, with prices from £149 to £867, a £718 spread on the same certified stone. MOH London lists it at £867. 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
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.9°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG816614263
Dimensions7.41 × 7.35 × 4.50 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.41 mm7.35 mm1.51 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG816614263
Side View
Table 60.0%Crown 35.9°Girdle: MediumPavilion 40.8°Culet: NoneDepth 61.0%

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: £867 GBP|Low: £149 GBP|High: £878 GBP|Avg: £470 GBP
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 7£149 GBP
Retailer 8£186 GBP
Retailer 9£322 GBP
Retailer 3£336 GBP
Retailer 2£337 GBP
Retailer 5£535 GBP
Retailer 4£598 GBP
Retailer 6£691 GBP
MOH London£867 GBP

43 data points across 9 retailers

14 retailers£149 GBP to £867 GBP

A
Cheapest Retailer
-
£149 GBP
A
Retailer 2
-
£173 GBP
View
A
Retailer 3
-
£186 GBP
View
Retailer 4
-
£186 GBP
View
Price last confirmed 12 days ago
A
Retailer 5
-
£317 GBP
View
B+
Retailer 6
-
£322 GBP
View
A
Retailer 7
-
£336 GBP
View
A
Retailer 8
-
£337 GBP
View
B+
Retailer 9
-
£535 GBP
View
B+
Retailer 10
-
£596 GBP
View
B
Retailer 11
-
£598 GBP
View
B
Retailer 12
-
£635 GBP
View
B
Retailer 13
-
£691 GBP
View
Most Expensive
B
MOH London
LG816614263 · Nov 2
£867 GBP
View
13 more retailers have this diamond
Prices start from £149 GBPSave up to £718 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
£149 GBP