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1.23ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG561281096

Shape and cutting style on the report: Round brilliant

Certificate IGI LG561281096

Diamond specifications and retailer prices

From £195 GBP
As of November 6, 2026
Save £476 GBP (71%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £671 GBP at MOH London · As of November 4, 2026
View at MOH London

About this 1.23ct lab-grown round diamond

This 1.23ct lab-grown round sits in the classic one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG561281096 or 561281096. Listed at 7 retailers as of November 4, 2026, with prices from £195 to £671, a £476 spread on the same certified stone. MOH London lists it at £671. 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

1.23
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.4°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG561281096
Dimensions6.85 × 6.81 × 4.22 mm
L/W Ratio1.01
Girdle conditionFaceted
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
6.85 mm6.81 mm1.23 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG561281096
Side View
Table 57.0%Crown 35.4°Girdle: MED-STKPavilion 40.5°Culet: NoneDepth 61.7%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £671 GBP|Low: £195 GBP|High: £685 GBP|Avg: £371 GBP|-1.9%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 6£195 GBP
Retailer 2£249 GBP
Retailer 7£282 GBP
Retailer 3£331 GBP
Retailer 4£386 GBP
Retailer 5£503 GBP
MOH London£671 GBP

41 data points across 7 retailers

7 retailers£195 GBP to £671 GBP

B+
Cheapest Retailer
-
£195 GBP
A
Retailer 2
-
£249 GBP
View
A
Retailer 3
-
£282 GBP
View
B+
Retailer 4
-
£331 GBP
View
B+
Retailer 5
-
£386 GBP
View
B
Retailer 6
-
£503 GBP
View
Most Expensive
B
MOH London
LG561281096 · Nov 4
£671 GBP
View
6 more retailers have this diamond
Prices start from £195 GBPSave up to £476 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
1.23ct Round
£195 GBP