Round|Lab Grown|IGI

1.50ct G SI1 Round Lab Grown Diamond

EX • G/SI1 • IGI LG818685585

Shape and cutting style on the report: Round brilliant

Certificate IGI LG818685585

Diamond specifications and retailer prices

From £160 GBP
As of November 4, 2026
Save £711 GBP (82%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £871 GBP at Reve Diamonds · As of November 6, 2026
View at Reve Diamonds

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 G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG818685585 or 818685585. Listed at 21 retailers as of November 4, 2026, with prices from £160 to £871, a £711 spread on the same certified stone. Reve Diamonds lists it at £871. 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
G
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle31.7°
Pavilion angle41.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818685585
Dimensions7.40 × 7.45 × 4.47 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.40 mm7.45 mm1.50 ctG / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818685585
Side View
Table 59.0%Crown 31.7°Girdle: MED-STKPavilion 41.3°Culet: NoneDepth 60.1%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 4
Current: £320 GBP|Low: £143 GBP|High: £843 GBP|Avg: £336 GBP|+4.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 9£143 GBP
Retailer 6£160 GBP
Retailer 4£178 GBP
Retailer 8£241 GBP
Retailer 3£299 GBP
Retailer 7£319 GBP
Retailer 1£320 GBP
Retailer 5£574 GBP
Retailer 2£830 GBP

45 data points across 9 retailers

21 retailers£160 GBP to £871 GBP

Retailer 1
-
£143 GBP
Price last confirmed 17 days ago
Retailer 2
-
£143 GBP
View
Price last confirmed 46 days ago
Retailer 3
-
£143 GBP
View
Price last confirmed 38 days ago
A
Retailer 4
-
£160 GBP
View
Final sale: no returns
Retailer 5
-
£166 GBP
View
Price last confirmed 45 days ago
Retailer 6
-
£176 GBP
View
Price last confirmed 45 days ago
Retailer 7
-
£176 GBP
View
Price last confirmed 66 days ago
Retailer 8
-
£176 GBP
View
Price last confirmed 38 days ago
A
Retailer 9
-
£178 GBP
View
Retailer 10
-
£178 GBP
View
Price last confirmed 29 days ago
B+
Retailer 11
-
£241 GBP
View
A
Retailer 12
-
£299 GBP
View
A
Retailer 13
-
£320 GBP
View
A
Retailer 14
-
£333 GBP
View
Retailer 15
-
£573 GBP
View
Price last confirmed 37 days ago
B+
Retailer 16
-
£573 GBP
View
Retailer 17
-
£573 GBP
View
Price last confirmed 46 days ago
B+
Retailer 18
-
£574 GBP
View
B
Retailer 19
-
£612 GBP
View
B
Retailer 20
-
£830 GBP
View
Most Expensive
B
Reve Diamonds
9A134B3A8 · Nov 6
£871 GBP
$1,172 USD
View
20 more retailers have this diamond
Prices start from £160 GBPSave up to £711 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
£160 GBP