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3.81ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG626421301

Shape and cutting style on the report: Round brilliant

Certificate IGI LG626421301

Diamond specifications and retailer prices

From £1,013 GBP
CA$1,889 CAD
As of November 2, 2026
Save £327 GBP (24%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £1,340 GBP at The Diamond Guys · As of November 1, 2026
View at The Diamond Guys

About this 3.81ct lab-grown round diamond

This 3.81ct 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 LG626421301 or 626421301. Listed at 2 retailers as of November 1, 2026, with prices from £1,013 to £1,340, a £327 spread on the same certified stone. The Diamond Guys lists it at £1,340. 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

3.81
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.2°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG626421301
Dimensions10.13 × 10.09 × 6.10 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
10.13 mm10.09 mm3.81 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG626421301
Side View
Table 58.0%Crown 34.2°Girdle: MediumPavilion 40.7°Culet: NoneDepth 60.3%

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: £1,680 GBP|Low: £201 GBP|High: £2,481 GBP|Avg: £1,010 GBP|-4.2%
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£548 GBP
Retailer 6£611 GBP
Retailer 9£665 GBP
Retailer 11£676 GBP
Retailer 8£784 GBP
Retailer 5£817 GBP
Retailer 4£836 GBP
Retailer 7£1,013 GBP
Retailer 2£1,297 GBP
The Diamond Guys£1,340 GBP
Retailer 1£1,680 GBP
Retailer 10£2,087 GBP

59 data points across 12 retailers

2 retailers£1,013 GBP to £1,340 GBP

B+
Cheapest Retailer
-
£1,013 GBP
CA$1,889 CAD
Most Expensive
B
The Diamond Guys
1954434350 · Nov 1
£1,340 GBP
$1,798 USD
View
1 more retailer has this diamond
Prices start from £1,013 GBPSave up to £327 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+
3.81ct Round
£1,013 GBP