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Round|Lab Grown|IGI

3.05ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG628498547

Shape and cutting style on the report: Round brilliant

Certificate IGI LG628498547

Diamond specifications and retailer prices

From £918 GBP
As of November 5, 2026
Save £1,086 GBP (54%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £3,535 GBP at The Diamond Guys · As of November 6, 2026
View at The Diamond Guys

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 LG628498547 or 628498547. Listed at 6 retailers as of November 5, 2026, with a 118% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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 angle33.6°
Pavilion angle41.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG628498547
Dimensions9.37 × 9.29 × 5.67 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
9.37 mm9.29 mm3.05 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG628498547
Side View
Table 60.0%Crown 33.6°Girdle: MediumPavilion 41.4°Culet: NoneDepth 60.8%

Caratlytics Score

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B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £1,196 GBP|Low: £499 GBP|High: £5,535 GBP|Avg: £1,476 GBP|-12.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
The Diamond Guys
November 6, 2026
Retailer 8£499 GBP
Retailer 9£623 GBP
Retailer 4£802 GBP
Retailer 7£854 GBP
Retailer 6£1,019 GBP
Retailer 11£1,164 GBP
Retailer 5£1,190 GBP
Retailer 1£1,196 GBP
The Diamond Guys£1,215 GBP
Retailer 3£1,400 GBP
Retailer 12£1,608 GBP
Retailer 10£2,004 GBP
Retailer 2£5,535 GBP

2 data points across 13 retailers

6 retailers£918 GBP to £2,004 GBP

B+
Cheapest Retailer
-
£918 GBP
B+
Retailer 2
-
£1,019 GBP
View
B+
Retailer 3
-
£1,196 GBP
View
B
Retailer 4
-
£1,215 GBP
View
B
Retailer 5
-
£2,004 GBP
View
Most Expensive
The Diamond Guys
1959846517 · Nov 6
£3,535 GBP
$4,758 USD
View
Price under review
5 more retailers have this diamond
Prices start from £918 GBPSave up to £1,086 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.

B+
3.05ct Round
£918 GBP