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Round|Lab Grown|IGI

1.03ct F IF Round Lab Grown Diamond

ID • F/IF • IGI LG642427138

Shape and cutting style on the report: Round brilliant

Certificate IGI LG642427138

Diamond specifications and retailer prices

From £135 GBP
As of November 3, 2026
Save £799 GBP (86%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: £933 GBP at Brilliant Earth · As of November 3, 2026
View at Brilliant Earth

About this 1.03ct lab-grown round diamond

This 1.03ct lab-grown round sits in the classic one-carat band, graded F colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG642427138 or 642427138. Listed at 23 retailers as of November 3, 2026, with prices from £135 to £933, a £799 spread on the same certified stone. Brilliant Earth lists it at £933. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.03
Carat
F
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG642427138
Dimensions6.57 × 6.54 × 3.94 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
6.57 mm6.54 mm1.03 ctF / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG642427138
Side View
Table 59.0%Crown 33°Girdle: MediumPavilion 41°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 3
Current: £933 GBP|Low: £112 GBP|High: £1,141 GBP|Avg: £412 GBP|-18.2%
Brilliant Earth
Retailer 2
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Retailer 19
November 5, 2026
Retailer 7£135 GBP
Retailer 10£139 GBP
Retailer 3£150 GBP
Retailer 19£156 GBP
Retailer 9£166 GBP
Retailer 8£281 GBP
Retailer 16£288 GBP
Retailer 4£296 GBP
Retailer 2£298 GBP
Retailer 18£345 GBP
Retailer 17£347 GBP
Retailer 15£407 GBP
Retailer 11£445 GBP
Retailer 14£567 GBP
Retailer 6£577 GBP
Retailer 13£633 GBP
Retailer 12£779 GBP
Retailer 5£841 GBP
Brilliant Earth£933 GBP

31 data points across 19 retailers

23 retailers£135 GBP to £933 GBP

Retailer 1
-
£112 GBP
Price last confirmed 18 days ago
A
Retailer 2
-
£135 GBP
View
Retailer 3
-
£139 GBP
View
Price last confirmed 17 days ago
A
Retailer 4
-
£150 GBP
View
Final sale: no returns
A
Retailer 5
-
£156 GBP
View
Retailer 6
-
£166 GBP
View
Price last confirmed 11 days ago
Retailer 7
-
£176 GBP
View
Price last confirmed 23 days ago
Retailer 8
-
£281 GBP
View
Price last confirmed 7 days ago
A
Retailer 9
-
£288 GBP
View
A
Retailer 10
-
£296 GBP
View
A
Retailer 11
-
£298 GBP
View
B+
Retailer 12
-
£345 GBP
View
B+
Retailer 13
-
£347 GBP
View
B+
Retailer 14
-
£407 GBP
View
B+
Retailer 15
-
£426 GBP
View
Retailer 16
-
£445 GBP
View
Price last confirmed 18 days ago
B
Retailer 17
-
£567 GBP
View
B
Retailer 18
-
£577 GBP
View
B
Retailer 19
-
£633 GBP
View
Retailer 20
-
£670 GBP
View
Price last confirmed 29 days ago
B
Retailer 21
-
£779 GBP
View
B
Retailer 22
-
£841 GBP
View
Most Expensive
B
Brilliant Earth
14081239A · Nov 3
£933 GBP
$1,260 USD
View
22 more retailers have this diamond
Prices start from £135 GBPSave up to £799 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
1.03ct Round
£135 GBP