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Round|Lab Grown|IGI

1.50ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG526273935

Shape and cutting style on the report: Round brilliant

Certificate IGI LG526273935

Diamond specifications and retailer prices

From £147 GBP
As of November 5, 2026
Save £908 GBP (86%) vs most expensive(unlock to see where)
14 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 LG526273935 or 526273935. Listed at 14 retailers as of November 5, 2026, with prices from £147 to £1,055, a £908 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
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.3°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG526273935
Dimensions7.37 × 7.35 × 4.52 mm
L/W Ratio1.00
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
7.37 mm7.35 mm1.50 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG526273935
Side View
Table 59.0%Crown 35.3°Girdle: MediumPavilion 41.1°Culet: NoneDepth 61.4%

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: £1,055 GBP|Low: £147 GBP|High: £1,055 GBP|Avg: £408 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 8£147 GBP
Retailer 11£165 GBP
Retailer 9£182 GBP
Retailer 10£245 GBP
Retailer 2£329 GBP
Retailer 5£334 GBP
Retailer 3£373 GBP
Retailer 4£542 GBP
Retailer 7£588 GBP
Retailer 6£851 GBP
Brilliant Earth£1,055 GBP

44 data points across 11 retailers

14 retailers£147 GBP to £1,055 GBP

A
Cheapest Retailer
-
£147 GBP
A
Retailer 2
-
£165 GBP
View
Final sale: no returns
A
Retailer 3
-
£171 GBP
View
A
Retailer 4
-
£182 GBP
View
Retailer 5
-
£182 GBP
View
Price last confirmed 12 days ago
B+
Retailer 6
-
£245 GBP
View
A
Retailer 7
-
£329 GBP
View
A
Retailer 8
-
£334 GBP
View
A
Retailer 9
-
£373 GBP
View
B
Retailer 10
-
£542 GBP
View
B+
Retailer 11
-
£586 GBP
View
B+
Retailer 12
-
£588 GBP
View
B
Retailer 13
-
£851 GBP
View
Most Expensive
B
Brilliant Earth
16211586A · Nov 5
£1,055 GBP
$1,420 USD
View
13 more retailers have this diamond
Prices start from £147 GBPSave up to £908 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
£147 GBP