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Round|Lab Grown|IGI

1.23ct H VS1 Round Lab Grown Diamond

ID • H/VS1 • IGI LG811646756

Shape and cutting style on the report: Round brilliant

Certificate IGI LG811646756

Diamond specifications and retailer prices

From £151 GBP
As of November 3, 2026
Save £725 GBP (83%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £876 GBP at MOH London · As of November 5, 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 H colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG811646756 or 811646756. Listed at 18 retailers as of November 3, 2026, with prices from £151 to £876, a £725 spread on the same certified stone. MOH London lists it at £876. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.23
Carat
H
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.2°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG811646756
Dimensions6.89 × 6.86 × 4.23 mm
L/W Ratio1.00
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.89 mm6.86 mm1.23 ctH / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG811646756
Side View
Table 59.0%Crown 35.2°Girdle: MediumPavilion 41°Culet: NoneDepth 61.5%

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 3
Current: £876 GBP|Low: £145 GBP|High: £888 GBP|Avg: £415 GBP|-0.2%
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£151 GBP
Retailer 4£187 GBP
Retailer 14£187 GBP
Retailer 6£314 GBP
Retailer 10£324 GBP
Retailer 15£325 GBP
Retailer 9£343 GBP
Retailer 3£369 GBP
Retailer 2£381 GBP
Retailer 13£452 GBP
Retailer 11£459 GBP
Retailer 8£606 GBP
Retailer 7£643 GBP
Retailer 5£678 GBP
MOH London£876 GBP

32 data points across 15 retailers

18 retailers£151 GBP to £876 GBP

A
Cheapest Retailer
-
£151 GBP
A
Retailer 2
-
£176 GBP
View
Retailer 3
-
£187 GBP
View
Price last confirmed 11 days ago
A
Retailer 4
-
£187 GBP
View
A
Retailer 5
-
£314 GBP
View
A
Retailer 6
-
£324 GBP
View
A
Retailer 7
-
£325 GBP
View
B+
Retailer 8
-
£343 GBP
View
B+
Retailer 9
-
£369 GBP
View
B+
Retailer 10
-
£381 GBP
View
B+
Retailer 11
-
£452 GBP
View
Retailer 12
-
£459 GBP
View
Price last confirmed 9 days ago
B+
Retailer 13
-
£489 GBP
View
B
Retailer 14
-
£604 GBP
View
B
Retailer 15
-
£606 GBP
View
B
Retailer 16
-
£643 GBP
View
B
Retailer 17
-
£692 GBP
View
Most Expensive
B
MOH London
LG811646756 · Nov 5
£876 GBP
View
17 more retailers have this diamond
Prices start from £151 GBPSave up to £725 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
£151 GBP