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3.65ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG623496204

Shape and cutting style on the report: Round brilliant

Certificate IGI LG623496204

Diamond specifications and retailer prices

From £939 GBP
CA$1,747 CAD
As of October 30, 2026
Save £303 GBP (24%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £1,242 GBP at The Diamond Guys · As of October 30, 2026
View at The Diamond Guys

About this 3.65ct lab-grown round diamond

This 3.65ct 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 LG623496204 or 623496204. Listed at 2 retailers as of October 30, 2026, with prices from £939 to £1,242, a £303 spread on the same certified stone. The Diamond Guys lists it at £1,242. 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

3.65
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.2°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG623496204
Dimensions9.96 × 9.91 × 6.06 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
9.96 mm9.91 mm3.65 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG623496204
Side View
Table 57.0%Crown 34.2°Girdle: MED-STKPavilion 40.9°Culet: NoneDepth 61.0%

Caratlytics Score

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B+
Very Good
Strong quality and value balance
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Price History

Last verified: Oct 30
Current: £799 GBP|Low: £191 GBP|High: £2,515 GBP|Avg: £982 GBP|-5.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
The Diamond Guys
August 3, 2026
Retailer 3£516 GBP
Retailer 4£559 GBP
Retailer 8£640 GBP
Retailer 11£644 GBP
Retailer 5£754 GBP
Retailer 7£775 GBP
Retailer 1£799 GBP
Retailer 6£939 GBP
Retailer 2£1,224 GBP
The Diamond Guys£1,242 GBP
Retailer 9£1,978 GBP
Retailer 10£2,515 GBP

62 data points across 12 retailers

2 retailers£939 GBP to £1,242 GBP

B+
Cheapest Retailer
-
£939 GBP
CA$1,747 CAD
Most Expensive
B
The Diamond Guys
1954434380 · Oct 30
£1,242 GBP
$1,664 USD
View
1 more retailer has this diamond
Prices start from £939 GBPSave up to £303 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+
3.65ct Round
£939 GBP