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Round|Lab Grown|IGI

3.79ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG626421285

Shape and cutting style on the report: Round brilliant

Certificate IGI LG626421285

Diamond specifications and retailer prices

From £1,008 GBP
CA$1,879 CAD
As of November 2, 2026
Save £325 GBP (24%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £1,333 GBP at The Diamond Guys · As of November 3, 2026
View at The Diamond Guys

About this 3.79ct lab-grown round diamond

This 3.79ct 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 LG626421285 or 626421285. Listed at 2 retailers as of November 2, 2026, with prices from £1,008 to £1,333, a £325 spread on the same certified stone. The Diamond Guys lists it at £1,333. 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

3.79
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG626421285
Dimensions10.12 × 10.08 × 6.08 mm
L/W Ratio1.00
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
10.12 mm10.08 mm3.79 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG626421285
Side View
Table 58.0%Crown 34°Girdle: MediumPavilion 40.7°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: £1,636 GBP|Low: £200 GBP|High: £3,853 GBP|Avg: £1,132 GBP|-4.4%
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£545 GBP
Retailer 7£592 GBP
Retailer 10£662 GBP
Retailer 12£674 GBP
Retailer 9£780 GBP
Retailer 6£809 GBP
Retailer 5£833 GBP
Retailer 8£1,008 GBP
Retailer 3£1,289 GBP
The Diamond Guys£1,333 GBP
Retailer 1£1,636 GBP
Retailer 11£2,079 GBP
Retailer 2£3,853 GBP

61 data points across 13 retailers

2 retailers£1,008 GBP to £1,333 GBP

B+
Cheapest Retailer
-
£1,008 GBP
CA$1,879 CAD
Most Expensive
B
The Diamond Guys
1954434356 · Nov 3
£1,333 GBP
$1,789 USD
View
1 more retailer has this diamond
Prices start from £1,008 GBPSave up to £325 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+
3.79ct Round
£1,008 GBP