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Round|Lab Grown|IGI

1.50ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG794627540

Shape and cutting style on the report: Round brilliant

Certificate IGI LG794627540

Diamond specifications and retailer prices

From £170 GBP
As of November 5, 2026
Save £787 GBP (82%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: £956 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 F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG794627540 or 794627540. Listed at 22 retailers as of November 5, 2026, with prices from £170 to £956, a £787 spread on the same certified stone. Brilliant Earth lists it at £956. 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
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.1°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG794627540
Dimensions7.44 × 7.42 × 4.48 mm
L/W Ratio1.00
Girdle conditionFaceted
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
7.44 mm7.42 mm1.50 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG794627540
Side View
Table 59.0%Crown 33.1°Girdle: MED-STKPavilion 41.1°Culet: NoneDepth 60.3%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 5
Current: £956 GBP|Low: £168 GBP|High: £956 GBP|Avg: £450 GBP|+1.6%
Brilliant Earth
Retailer 2
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Retailer 18
November 6, 2026
Retailer 9£170 GBP
Retailer 16£189 GBP
Retailer 18£196 GBP
Retailer 4£210 GBP
Retailer 5£211 GBP
Retailer 6£358 GBP
Retailer 2£364 GBP
Retailer 11£384 GBP
Retailer 12£388 GBP
Retailer 3£399 GBP
Retailer 17£421 GBP
Retailer 14£545 GBP
Retailer 10£676 GBP
Retailer 15£678 GBP
Retailer 8£715 GBP
Retailer 13£840 GBP
Retailer 7£956 GBP
Brilliant Earth£956 GBP

29 data points across 18 retailers

22 retailers£170 GBP to £956 GBP

A
Cheapest Retailer
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£170 GBP
A
Retailer 2
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£189 GBP
View
Final sale: no returns
Retailer 3
-
£196 GBP
View
Price last confirmed 66 days ago
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Retailer 4
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£196 GBP
View
A
Retailer 5
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£210 GBP
View
Retailer 6
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£211 GBP
View
Price last confirmed 12 days ago
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Retailer 7
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£322 GBP
View
A
Retailer 8
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£358 GBP
View
A
Retailer 9
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£364 GBP
View
A
Retailer 10
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£384 GBP
View
A
Retailer 11
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£388 GBP
View
B+
Retailer 12
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£399 GBP
View
B+
Retailer 13
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£421 GBP
View
B+
Retailer 14
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£545 GBP
View
B+
Retailer 15
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£584 GBP
View
Retailer 16
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£670 GBP
View
Price last confirmed 46 days ago
B
Retailer 17
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£676 GBP
View
B
Retailer 18
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£678 GBP
View
B
Retailer 19
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£715 GBP
View
B
Retailer 20
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£840 GBP
View
B
Retailer 21
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£956 GBP
View
Most Expensive
B
Brilliant Earth
20701253A · Nov 5
£956 GBP
$1,280 USD
View
21 more retailers have this diamond
Prices start from £170 GBPSave up to £787 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
£170 GBP