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Round|Lab Grown|IGI

3.05ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG735588309

Shape and cutting style on the report: Round brilliant

Certificate IGI LG735588309

Diamond specifications and retailer prices

From £274 GBP
As of November 5, 2026
Save £1,301 GBP (83%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £1,575 GBP at Brilliant Earth · As of November 5, 2026
View at Brilliant Earth

About this 3.05ct lab-grown round diamond

This 3.05ct lab-grown round sits in the three to five carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG735588309 or 735588309. Listed at 18 retailers as of November 5, 2026, with prices from £274 to £1,575, a £1,301 spread on the same certified stone. Brilliant Earth lists it at £1,575. 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

3.05
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.3°
Pavilion angle41.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG735588309
Dimensions9.33 × 9.37 × 5.68 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.33 mm9.37 mm3.05 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG735588309
Side View
Table 60.0%Crown 33.3°Girdle: MediumPavilion 41.2°Culet: NoneDepth 60.7%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 5
Current: £1,575 GBP|Low: £266 GBP|High: £1,575 GBP|Avg: £710 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
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Retailer 17
November 6, 2026
Retailer 6£274 GBP
Retailer 9£311 GBP
Retailer 16£318 GBP
Retailer 3£340 GBP
Retailer 5£340 GBP
Retailer 14£453 GBP
Retailer 8£457 GBP
Retailer 2£543 GBP
Retailer 10£606 GBP
Retailer 4£630 GBP
Retailer 17£708 GBP
Retailer 15£839 GBP
Retailer 13£997 GBP
Retailer 7£1,094 GBP
Retailer 12£1,278 GBP
Retailer 11£1,325 GBP
Brilliant Earth£1,575 GBP

44 data points across 17 retailers

18 retailers£274 GBP to £1,575 GBP

A
Cheapest Retailer
-
£274 GBP
A
Retailer 2
-
£311 GBP
View
Final sale: no returns
A
Retailer 3
-
£318 GBP
View
A
Retailer 4
-
£340 GBP
View
Retailer 5
-
£340 GBP
View
Price last confirmed 12 days ago
A
Retailer 6
-
£453 GBP
View
B+
Retailer 7
-
£457 GBP
View
A
Retailer 8
-
£543 GBP
View
A
Retailer 9
-
£606 GBP
View
A
Retailer 10
-
£630 GBP
View
B+
Retailer 11
-
£708 GBP
View
B+
Retailer 12
-
£839 GBP
View
B+
Retailer 13
-
£863 GBP
View
B+
Retailer 14
-
£997 GBP
View
B
Retailer 15
-
£1,094 GBP
View
B
Retailer 16
-
£1,278 GBP
View
B
Retailer 17
-
£1,325 GBP
View
Most Expensive
B
Brilliant Earth
15923330A · Nov 5
£1,575 GBP
$2,120 USD
View
17 more retailers have this diamond
Prices start from £274 GBPSave up to £1,301 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
3.05ct Round
£274 GBP