CaratHunter
Plans
Round|Lab Grown|IGI

1.51ct D SI1 Round Lab Grown Diamond

ID • D/SI1 • IGI LG794609842

Shape and cutting style on the report: Round brilliant

Certificate IGI LG794609842

Diamond specifications and retailer prices

From £147 GBP
As of November 5, 2026
Save £703 GBP (83%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £850 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 D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG794609842 or 794609842. Listed at 18 retailers as of November 5, 2026, with prices from £147 to £850, a £703 spread on the same certified stone. MOH London lists it at £850. 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
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.8°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG794609842
Dimensions7.52 × 7.48 × 4.43 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.52 mm7.48 mm1.51 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG794609842
Side View
Table 59.0%Crown 32.8°Girdle: MediumPavilion 40.4°Culet: NoneDepth 59.1%

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: £850 GBP|Low: £147 GBP|High: £879 GBP|Avg: £424 GBP|-3.0%
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
Retailer 15
Retailer 16
Retailer 17
Retailer 18
November 6, 2026
Retailer 8£147 GBP
Retailer 5£164 GBP
Retailer 4£171 GBP
Retailer 15£182 GBP
Retailer 9£184 GBP
Retailer 12£282 GBP
Retailer 6£317 GBP
Retailer 18£325 GBP
Retailer 2£329 GBP
Retailer 17£390 GBP
Retailer 3£429 GBP
Retailer 11£484 GBP
Retailer 14£550 GBP
Retailer 16£586 GBP
Retailer 10£596 GBP
Retailer 7£626 GBP
Retailer 13£773 GBP
MOH London£850 GBP

25 data points across 18 retailers

18 retailers£147 GBP to £850 GBP

A
Cheapest Retailer
-
£147 GBP
A
Retailer 2
-
£164 GBP
View
Final sale: no returns
A
Retailer 3
-
£171 GBP
View
A
Retailer 4
-
£182 GBP
View
Retailer 5
-
£184 GBP
View
Price last confirmed 12 days ago
A
Retailer 6
-
£282 GBP
View
B+
Retailer 7
-
£317 GBP
View
A
Retailer 8
-
£325 GBP
View
A
Retailer 9
-
£329 GBP
View
B+
Retailer 10
-
£390 GBP
View
B+
Retailer 11
-
£429 GBP
View
B+
Retailer 12
-
£484 GBP
View
B+
Retailer 13
-
£550 GBP
View
B+
Retailer 14
-
£586 GBP
View
B+
Retailer 15
-
£596 GBP
View
B+
Retailer 16
-
£626 GBP
View
B
Retailer 17
-
£773 GBP
View
Most Expensive
B
MOH London
LG794609842 · Nov 5
£850 GBP
View
17 more retailers have this diamond
Prices start from £147 GBPSave up to £703 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
£147 GBP