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Round|Lab Grown|IGI

1.51ct I SI1 Round Lab Grown Diamond

EX • I/SI1 • IGI LG440012035

Shape and cutting style on the report: Round brilliant

Certificate IGI LG440012035

Diamond specifications and retailer prices

From £624 GBP
As of November 5, 2026
Save £3,180 GBP (84%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £3,804 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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG440012035 or 440012035. Listed at 11 retailers as of November 3, 2026, with prices from £624 to £3,804, a £3,180 spread on the same certified stone. MOH London lists it at £3,804. 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
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle31.7°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG440012035
Dimensions7.48 × 7.50 × 4.43 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) process Type IIa
Top View
7.48 mm7.50 mm1.51 ctI / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG440012035
Side View
Table 58.5%Crown 31.7°Girdle: THN-MEDPavilion 40.6°Culet: NoneDepth 59.2%

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 5
Current: £3,804 GBP|Low: £624 GBP|High: £3,855 GBP|Avg: £1,900 GBP
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 1, 2026
Retailer 2£624 GBP
Retailer 3£1,021 GBP
Retailer 6£1,142 GBP
Retailer 4£1,184 GBP
Retailer 7£1,311 GBP
Retailer 9£1,620 GBP
Retailer 5£1,870 GBP
Retailer 8£2,207 GBP
Retailer 10£3,388 GBP
MOH London£3,804 GBP

15 data points across 10 retailers

11 retailers£624 GBP to £3,804 GBP

A
Cheapest Retailer
-
£624 GBP
B+
Retailer 2
-
£1,021 GBP
View
B+
Retailer 3
-
£1,110 GBP
View
B+
Retailer 4
-
£1,142 GBP
View
Final sale: no returns
Retailer 5
-
£1,184 GBP
View
Price last confirmed 25 days ago
B+
Retailer 6
-
£1,184 GBP
View
B
Retailer 7
-
£1,311 GBP
View
B
Retailer 8
-
£1,870 GBP
View
B
Retailer 9
-
£2,207 GBP
View
B
Retailer 10
-
£2,219 GBP
View
Most Expensive
B
MOH London
LG440012035 · Nov 3
£3,804 GBP
View
10 more retailers have this diamond
Prices start from £624 GBPSave up to £3,180 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