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Round|Lab Grown|IGI

1.26ct E SI1 Round Lab Grown Diamond

VG • E/SI1 • IGI LG766644661

Shape and cutting style on the report: Round brilliant

Certificate IGI LG766644661

Diamond specifications and retailer prices

From £265 GBP
As of November 3, 2026
Save £458 GBP (63%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £723 GBP at MOH London · As of November 2, 2026
View at MOH London

About this 1.26ct lab-grown round diamond

This 1.26ct lab-grown round sits in the one-and-a-quarter to one-and-a-half carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG766644661 or 766644661. Listed at 10 retailers as of November 2, 2026, with prices from £265 to £723, a £458 spread on the same certified stone. MOH London lists it at £723. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.26
Carat
E
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle37.7°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG766644661
Dimensions6.99 × 6.90 × 4.26 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
6.99 mm6.90 mm1.26 ctE / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG766644661
Side View
Table 61.0%Crown 37.7°Girdle: THN-MEDPavilion 41.1°Culet: NoneDepth 61.3%

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 3
Current: £723 GBP|Low: £155 GBP|High: £744 GBP|Avg: £381 GBP|-2.9%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 4, 2026
Retailer 7£155 GBP
Retailer 3£265 GBP
Retailer 5£274 GBP
Retailer 9£277 GBP
Retailer 10£296 GBP
Retailer 8£341 GBP
Retailer 2£342 GBP
Retailer 4£404 GBP
Retailer 6£438 GBP
MOH London£723 GBP

33 data points across 10 retailers

10 retailers£265 GBP to £723 GBP

Retailer 1
-
£155 GBP
Price last confirmed 12 days ago
A
Retailer 2
-
£265 GBP
View
B+
Retailer 3
-
£274 GBP
View
B+
Retailer 4
-
£277 GBP
View
B+
Retailer 5
-
£296 GBP
View
B+
Retailer 6
-
£341 GBP
View
B+
Retailer 7
-
£342 GBP
View
B
Retailer 8
-
£404 GBP
View
B
Retailer 9
-
£438 GBP
View
Most Expensive
B
MOH London
LG766644661 · Nov 2
£723 GBP
View
9 more retailers have this diamond
Prices start from £265 GBPSave up to £458 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
1.26ct Round
£265 GBP