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Round|Lab Grown|IGI

1.28ct H VS1 Round Lab Grown Diamond

ID • H/VS1 • IGI LG770644956

Shape and cutting style on the report: Round brilliant

Certificate IGI LG770644956

Diamond specifications and retailer prices

From £157 GBP
As of November 3, 2026
Save £620 GBP (80%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £777 GBP at MOH London · As of November 5, 2026
View at MOH London

About this 1.28ct lab-grown round diamond

This 1.28ct lab-grown round sits in the one-and-a-quarter to one-and-a-half carat band, graded H colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG770644956 or 770644956. Listed at 18 retailers as of November 3, 2026, with prices from £157 to £777, a £620 spread on the same certified stone. MOH London lists it at £777. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.28
Carat
H
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.7°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG770644956
Dimensions7.00 × 7.04 × 4.30 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.00 mm7.04 mm1.28 ctH / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG770644956
Side View
Table 57.0%Crown 34.7°Girdle: MediumPavilion 41°Culet: NoneDepth 61.3%

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 3
Current: £777 GBP|Low: £150 GBP|High: £788 GBP|Avg: £419 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
November 5, 2026
Retailer 10£157 GBP
Retailer 12£194 GBP
Retailer 13£334 GBP
Retailer 9£335 GBP
Retailer 5£337 GBP
Retailer 8£355 GBP
Retailer 3£376 GBP
Retailer 2£385 GBP
Retailer 11£474 GBP
Retailer 7£475 GBP
Retailer 6£627 GBP
Retailer 4£706 GBP
MOH London£777 GBP

30 data points across 13 retailers

18 retailers£157 GBP to £777 GBP

A
Cheapest Retailer
-
£157 GBP
A
Retailer 2
-
£181 GBP
View
Retailer 3
-
£194 GBP
View
Price last confirmed 11 days ago
A
Retailer 4
-
£194 GBP
View
A
Retailer 5
-
£334 GBP
View
A
Retailer 6
-
£335 GBP
View
A
Retailer 7
-
£337 GBP
View
A
Retailer 8
-
£355 GBP
View
A
Retailer 9
-
£376 GBP
View
A
Retailer 10
-
£385 GBP
View
B+
Retailer 11
-
£474 GBP
View
A
Retailer 12
-
£475 GBP
View
B+
Retailer 13
-
£509 GBP
View
B+
Retailer 14
-
£624 GBP
View
B+
Retailer 15
-
£627 GBP
View
B
Retailer 16
-
£664 GBP
View
B+
Retailer 17
-
£720 GBP
View
Most Expensive
B+
MOH London
LG770644956 · Nov 5
£777 GBP
View
17 more retailers have this diamond
Prices start from £157 GBPSave up to £620 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
1.28ct Round
£157 GBP