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Round|Lab Grown|IGI

1.51ct I SI1 Round Lab Grown Diamond

ID • I/SI1 • IGI LG442068637

Shape and cutting style on the report: Round brilliant

Certificate IGI LG442068637

Diamond specifications and retailer prices

From £624 GBP
As of November 5, 2026
Save £3,169 GBP (84%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £3,793 GBP at MOH London · As of November 5, 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 LG442068637 or 442068637. Listed at 11 retailers as of November 5, 2026, with prices from £624 to £3,793, a £3,169 spread on the same certified stone. MOH London lists it at £3,793. 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
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.6°
Pavilion angle40.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG442068637
Dimensions7.37 × 7.46 × 4.51 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
7.37 mm7.46 mm1.51 ctI / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG442068637
Side View
Table 54.5%Crown 33.6°Girdle: MED-STKPavilion 40.1°Culet: NoneDepth 61.1%

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: £3,793 GBP|Low: £624 GBP|High: £3,850 GBP|Avg: £1,698 GBP|-1.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 5, 2026
Retailer 2£624 GBP
Retailer 3£1,021 GBP
Retailer 6£1,143 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
MOH London£3,793 GBP

14 data points across 9 retailers

11 retailers£624 GBP to £3,793 GBP

A
Cheapest Retailer
-
£624 GBP
B+
Retailer 2
-
£1,021 GBP
View
B+
Retailer 3
-
£1,110 GBP
View
B+
Retailer 4
-
£1,143 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
LG442068637 · Nov 5
£3,793 GBP
View
10 more retailers have this diamond
Prices start from £624 GBPSave up to £3,169 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