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Round|Lab Grown|IGI

1.51ct I SI2 Round Lab Grown Diamond

ID • I/SI2 • IGI LG425065833

Shape and cutting style on the report: Round brilliant

Certificate IGI LG425065833

Diamond specifications and retailer prices

From £624 GBP
As of November 5, 2026
Save £2,797 GBP (82%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £3,421 GBP at MOH London · As of November 3, 2026
View at MOH London

About this 1.51ct lab-grown round diamond

This 1.51ct lab-grown round sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG425065833 or 425065833. Listed at 10 retailers as of November 3, 2026, with prices from £624 to £3,421, a £2,797 spread on the same certified stone. MOH London lists it at £3,421. 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

1.51
Carat
I
Colour
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.9°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG425065833
Dimensions7.29 × 7.33 × 4.56 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
7.29 mm7.33 mm1.51 ctI / SI2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG425065833
Side View
Table 56.5%Crown 34.9°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.3%

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: £3,421 GBP|Low: £624 GBP|High: £3,463 GBP|Avg: £1,575 GBP
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 3, 2026
Retailer 2£624 GBP
Retailer 5£918 GBP
Retailer 8£999 GBP
Retailer 10£1,028 GBP
Retailer 6£1,065 GBP
Retailer 11£1,065 GBP
Retailer 3£1,501 GBP
Retailer 7£1,689 GBP
Retailer 9£1,996 GBP
Retailer 12£2,040 GBP
Retailer 4£2,384 GBP
MOH London£3,421 GBP

12 data points across 12 retailers

10 retailers£624 GBP to £3,421 GBP

A
Cheapest Retailer
-
£624 GBP
A
Retailer 2
-
£918 GBP
View
B+
Retailer 3
-
£999 GBP
View
B+
Retailer 4
-
£1,028 GBP
View
Final sale: no returns
B+
Retailer 5
-
£1,065 GBP
View
Retailer 6
-
£1,065 GBP
View
Price last confirmed 25 days ago
B
Retailer 7
-
£1,689 GBP
View
B
Retailer 8
-
£1,996 GBP
View
B
Retailer 9
-
£2,040 GBP
View
Most Expensive
B
MOH London
LG425065833 · Nov 3
£3,421 GBP
View
9 more retailers have this diamond
Prices start from £624 GBPSave up to £2,797 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
1.51ct Round
£624 GBP