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Round|Lab Grown|IGI

1.51ct E SI1 Round Lab Grown Diamond

EX • E/SI1 • IGI LG763660535

Shape and cutting style on the report: Round brilliant

Certificate IGI LG763660535

Diamond specifications and retailer prices

From £146 GBP
As of November 5, 2026
Save £916 GBP (86%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £1,062 GBP at Brilliant Earth · As of November 5, 2026
View at Brilliant Earth

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 top-tier cut grade and certified by IGI LG763660535 or 763660535. Listed at 17 retailers as of November 5, 2026, with prices from £146 to £1,062, a £916 spread on the same certified stone. Brilliant Earth lists it at £1,062. 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
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG763660535
Dimensions7.38 × 7.34 × 4.45 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
7.38 mm7.34 mm1.51 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG763660535
Side View
Table 60.0%Crown 34.5°Girdle: MED-STKPavilion 40.3°Culet: NoneDepth 60.5%

Caratlytics Score

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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: £1,062 GBP|Low: £140 GBP|High: £1,062 GBP|Avg: £439 GBP
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 9£146 GBP
Retailer 3£181 GBP
Retailer 10£245 GBP
Retailer 4£311 GBP
Retailer 2£325 GBP
Retailer 7£333 GBP
Retailer 11£400 GBP
Retailer 6£542 GBP
Retailer 8£585 GBP
Retailer 5£845 GBP
Brilliant Earth£1,062 GBP

42 data points across 11 retailers

17 retailers£146 GBP to £1,062 GBP

A
Cheapest Retailer
-
£146 GBP
A
Retailer 2
-
£169 GBP
View
Retailer 3
-
£181 GBP
View
Price last confirmed 12 days ago
A
Retailer 4
-
£181 GBP
View
B+
Retailer 5
-
£245 GBP
View
A
Retailer 6
-
£311 GBP
View
A
Retailer 7
-
£314 GBP
View
A
Retailer 8
-
£325 GBP
View
A
Retailer 9
-
£333 GBP
View
B+
Retailer 10
-
£400 GBP
View
B+
Retailer 11
-
£428 GBP
View
B+
Retailer 12
-
£542 GBP
View
B+
Retailer 13
-
£583 GBP
View
B+
Retailer 14
-
£585 GBP
View
B+
Retailer 15
-
£591 GBP
View
B
Retailer 16
-
£845 GBP
View
Most Expensive
B
Brilliant Earth
20762441A · Nov 5
£1,062 GBP
$1,430 USD
View
16 more retailers have this diamond
Prices start from £146 GBPSave up to £916 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
£146 GBP