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Round|Lab Grown|IGI

1.25ct J VS1 Round Lab Grown Diamond

EX • J/VS1 • IGI LG447001340

Shape and cutting style on the report: Round brilliant

Certificate IGI LG447001340

Diamond specifications and retailer prices

From £528 GBP
As of November 5, 2026
Save £3,094 GBP (85%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £3,622 GBP at MOH London · As of November 5, 2026
View at MOH London

About this 1.25ct lab-grown round diamond

This 1.25ct lab-grown round sits in the one-and-a-quarter to one-and-a-half carat band, graded J colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG447001340 or 447001340. Listed at 13 retailers as of November 5, 2026, with prices from £528 to £3,622, a £3,094 spread on the same certified stone. MOH London lists it at £3,622. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.25
Carat
J
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.2°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG447001340
Dimensions6.79 × 6.82 × 4.31 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
6.79 mm6.82 mm1.25 ctJ / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG447001340
Side View
Table 58.0%Crown 36.2°Girdle: MED-STKPavilion 41°Culet: NoneDepth 63.2%

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 5
Current: £3,622 GBP|Low: £528 GBP|High: £3,679 GBP|Avg: £1,646 GBP|-1.3%
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
November 5, 2026
Retailer 8£528 GBP
Retailer 9£974 GBP
Retailer 14£1,060 GBP
Retailer 13£1,091 GBP
Retailer 10£1,130 GBP
Retailer 12£1,130 GBP
Retailer 4£1,259 GBP
Retailer 5£1,548 GBP
Retailer 11£1,788 GBP
Retailer 7£2,079 GBP
Retailer 6£2,106 GBP
Retailer 3£2,118 GBP
Retailer 2£2,472 GBP
MOH London£3,622 GBP

42 data points across 14 retailers

13 retailers£528 GBP to £3,622 GBP

A
Cheapest Retailer
-
£528 GBP
B+
Retailer 2
-
£974 GBP
View
B+
Retailer 3
-
£1,060 GBP
View
B
Retailer 4
-
£1,091 GBP
View
Final sale: no returns
B+
Retailer 5
-
£1,130 GBP
View
Retailer 6
-
£1,130 GBP
View
Price last confirmed 25 days ago
B
Retailer 7
-
£1,259 GBP
View
B
Retailer 8
-
£1,788 GBP
View
B
Retailer 9
-
£2,079 GBP
View
B
Retailer 10
-
£2,106 GBP
View
B
Retailer 11
-
£2,118 GBP
View
B
Retailer 12
-
£2,472 GBP
View
Most Expensive
B
MOH London
LG447001340 · Nov 5
£3,622 GBP
View
12 more retailers have this diamond
Prices start from £528 GBPSave up to £3,094 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
1.25ct Round
£528 GBP