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Round|Lab Grown|IGI

1.50ct E SI1 Round Lab Grown Diamond

EX • E/SI1 • IGI LG776623440

Shape and cutting style on the report: Round brilliant

Certificate IGI LG776623440

Diamond specifications and retailer prices

From £152 GBP
As of November 1, 2026
Save £903 GBP (86%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £1,055 GBP at Brilliant Earth · As of November 5, 2026
View at Brilliant Earth

About this 1.5ct lab-grown round diamond

This 1.5ct 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 LG776623440 or 776623440. Listed at 17 retailers as of November 1, 2026, with prices from £152 to £1,055, a £903 spread on the same certified stone. Brilliant Earth lists it at £1,055. 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

1.50
Carat
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG776623440
Dimensions7.28 × 7.24 × 4.53 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
7.28 mm7.24 mm1.50 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG776623440
Side View
Table 56.0%Crown 36°Girdle: MED-STKPavilion 40.2°Culet: NoneDepth 62.4%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 1
Current: £1,055 GBP|Low: £146 GBP|High: £1,055 GBP|Avg: £434 GBP
Brilliant Earth
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
November 6, 2026
Retailer 13£152 GBP
Retailer 3£189 GBP
Retailer 14£189 GBP
Retailer 2£230 GBP
Retailer 8£305 GBP
Retailer 6£312 GBP
Retailer 11£346 GBP
Retailer 5£378 GBP
Retailer 12£385 GBP
Retailer 10£546 GBP
Retailer 7£579 GBP
Retailer 4£606 GBP
Retailer 9£795 GBP
Brilliant Earth£1,055 GBP

45 data points across 14 retailers

17 retailers£152 GBP to £1,055 GBP

Retailer 1
-
£152 GBP
Price last confirmed 44 days ago
A
Retailer 2
-
£152 GBP
View
Retailer 3
-
£176 GBP
View
Price last confirmed 45 days ago
Retailer 4
-
£186 GBP
View
Price last confirmed 42 days ago
A
Retailer 5
-
£189 GBP
View
Retailer 6
-
£189 GBP
View
Price last confirmed 12 days ago
B+
Retailer 7
-
£230 GBP
View
A
Retailer 8
-
£305 GBP
View
A
Retailer 9
-
£312 GBP
View
B+
Retailer 10
-
£346 GBP
View
B+
Retailer 11
-
£378 GBP
View
B+
Retailer 12
-
£385 GBP
View
B+
Retailer 13
-
£546 GBP
View
B+
Retailer 14
-
£579 GBP
View
B
Retailer 15
-
£606 GBP
View
B
Retailer 16
-
£795 GBP
View
Most Expensive
B
Brilliant Earth
21117473A · Nov 5
£1,055 GBP
$1,420 USD
View
16 more retailers have this diamond
Prices start from £152 GBPSave up to £903 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
1.50ct Round
£152 GBP