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3.51ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG624443937

Shape and cutting style on the report: Round brilliant

Certificate IGI LG624443937

Diamond specifications and retailer prices

From £934 GBP
CA$1,740 CAD
As of November 2, 2026
Save £301 GBP (24%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £1,235 GBP at The Diamond Guys · As of November 1, 2026
View at The Diamond Guys

About this 3.51ct lab-grown round diamond

This 3.51ct 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 LG624443937 or 624443937. Listed at 2 retailers as of November 1, 2026, with prices from £934 to £1,235, a £301 spread on the same certified stone. The Diamond Guys lists it at £1,235. 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

3.51
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.1°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG624443937
Dimensions9.89 × 9.81 × 5.93 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
9.89 mm9.81 mm3.51 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG624443937
Side View
Table 59.0%Crown 34.1°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 60.2%

Caratlytics Score

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B+
Very Good
Strong quality and value balance
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Price History

Last verified: Nov 2
Current: £1,542 GBP|Low: £187 GBP|High: £3,562 GBP|Avg: £996 GBP|-5.2%
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
August 3, 2026
Retailer 4£510 GBP
Retailer 6£549 GBP
Retailer 11£628 GBP
Retailer 2£631 GBP
Retailer 7£700 GBP
Retailer 10£759 GBP
Retailer 5£788 GBP
Retailer 8£934 GBP
Retailer 3£1,196 GBP
The Diamond Guys£1,235 GBP
Retailer 1£1,542 GBP
Retailer 12£1,937 GBP
Retailer 9£3,562 GBP

59 data points across 13 retailers

2 retailers£934 GBP to £1,235 GBP

B+
Cheapest Retailer
-
£934 GBP
CA$1,740 CAD
Most Expensive
B
The Diamond Guys
1954434394 · Nov 1
£1,235 GBP
$1,657 USD
View
1 more retailer has this diamond
Prices start from £934 GBPSave up to £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.

B+
3.51ct Round
£934 GBP