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Round|Lab Grown|IGI

1.51ct K SI2 Round Lab Grown Diamond

EX • K/SI2 • IGI LG462132991

Shape and cutting style on the report: Round brilliant

Certificate IGI LG462132991

Diamond specifications and retailer prices

From £1,342 GBP
As of November 5, 2026
Save £1,576 GBP (54%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £4,433 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 K colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG462132991 or 462132991. Listed at 8 retailers as of November 5, 2026, with a 117% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
K
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.1°
Pavilion angle40.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG462132991
Dimensions7.34 × 7.37 × 4.46 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
Faint Brown This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
7.34 mm7.37 mm1.51 ctK / SI2
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG462132991
Side View
Table 60.0%Crown 36.1°GirdlePavilion 40.1°Culet: NoneDepth 60.6%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £4,433 GBP|Low: £1,288 GBP|High: £4,505 GBP|Avg: £2,487 GBP|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 5, 2026
Retailer 3£1,342 GBP
Retailer 6£1,460 GBP
Retailer 4£1,557 GBP
Retailer 8£2,063 GBP
Retailer 5£2,441 GBP
Retailer 2£2,618 GBP
Retailer 7£2,918 GBP
Retailer 9£3,483 GBP
MOH London£4,433 GBP

15 data points across 9 retailers

8 retailers£1,342 GBP to £2,918 GBP

B
Cheapest Retailer
-
£1,342 GBP
B
Retailer 2
-
£1,460 GBP
View
Retailer 3
-
£1,557 GBP
View
Price last confirmed 25 days ago
B
Retailer 4
-
£1,557 GBP
View
C
Retailer 5
-
£2,441 GBP
View
C
Retailer 6
-
£2,618 GBP
View
C
Retailer 7
-
£2,918 GBP
View
Most Expensive
MOH London
LG462132991 · Nov 5
£4,433 GBP
View
Price under review
7 more retailers have this diamond
Prices start from £1,342 GBPSave up to £1,576 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.

B
1.51ct Round
£1,342 GBP