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Round|Lab Grown|IGI

1.51ct E SI1 Round Lab Grown Diamond

VG • E/SI1 • IGI LG12201310

Shape and cutting style on the report: Round brilliant

Certificate IGI LG12201310

Diamond specifications and retailer prices

From £248 GBP
As of November 5, 2026
Save £1,078 GBP (81%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £1,326 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 E colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG12201310 or 12201310. Listed at 18 retailers as of November 3, 2026, with prices from £248 to £1,326, a £1,078 spread on the same certified stone. MOH London lists it at £1,326. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.51
Carat
E
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle41.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG12201310
Dimensions7.17 × 7.20 × 4.65 mm
L/W Ratio1.00
Culet sizeNone
Cert comments
As Grown - No indications of post-growth treatment. This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process.
Top View
7.17 mm7.20 mm1.51 ctE / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG12201310
Side View
Table 57.5%Crown 36.5°Girdle: STK-UNDPavilion 41.3°Culet: NoneDepth 64.7%

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: £1,326 GBP|Low: £248 GBP|High: £1,330 GBP|Avg: £656 GBP|-0.4%
MOH London
Retailer 2
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Retailer 12
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Retailer 18
November 6, 2026
Retailer 3£248 GBP
Retailer 4£265 GBP
Retailer 16£288 GBP
Retailer 7£308 GBP
Retailer 15£308 GBP
Retailer 14£314 GBP
Retailer 8£420 GBP
Retailer 12£488 GBP
Retailer 17£554 GBP
Retailer 11£581 GBP
Retailer 2£604 GBP
Retailer 10£623 GBP
Retailer 18£901 GBP
Retailer 9£970 GBP
Retailer 13£1,085 GBP
Retailer 6£1,091 GBP
Retailer 5£1,207 GBP
MOH London£1,326 GBP

21 data points across 18 retailers

18 retailers£248 GBP to £1,326 GBP

A
Cheapest Retailer
-
£248 GBP
A
Retailer 2
-
£265 GBP
View
A
Retailer 3
-
£288 GBP
View
Retailer 4
-
£308 GBP
View
Price last confirmed 12 days ago
B+
Retailer 5
-
£308 GBP
View
B+
Retailer 6
-
£314 GBP
View
B+
Retailer 7
-
£420 GBP
View
B+
Retailer 8
-
£488 GBP
View
B
Retailer 9
-
£554 GBP
View
B+
Retailer 10
-
£581 GBP
View
B
Retailer 11
-
£604 GBP
View
B
Retailer 12
-
£623 GBP
View
B
Retailer 13
-
£901 GBP
View
B
Retailer 14
-
£970 GBP
View
B
Retailer 15
-
£1,085 GBP
View
B
Retailer 16
-
£1,091 GBP
View
B
Retailer 17
-
£1,207 GBP
View
Most Expensive
B
MOH London
LG12201310 · Nov 3
£1,326 GBP
View
17 more retailers have this diamond
Prices start from £248 GBPSave up to £1,078 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
£248 GBP