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Round|Lab Grown|IGI

3.10ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG668469451

Shape and cutting style on the report: Round brilliant

Certificate IGI LG668469451

Diamond specifications and retailer prices

From £248 GBP
As of November 5, 2026
Save £1,067 GBP (81%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £1,315 GBP at Rare Carat · As of November 4, 2026
View at Rare Carat

About this 3.1ct lab-grown round diamond

This 3.1ct 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 LG668469451 or 668469451. Listed at 15 retailers as of November 4, 2026, with prices from £248 to £1,315, a £1,067 spread on the same certified stone. Rare Carat lists it at £1,315. 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

3.10
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG668469451
Dimensions9.34 × 9.36 × 5.77 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.34 mm9.36 mm3.10 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG668469451
Side View
Table 57.0%Crown 34.5°Girdle: MediumPavilion 40.9°Culet: NoneDepth 61.7%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £1,315 GBP|Low: £248 GBP|High: £3,170 GBP|Avg: £892 GBP|-24.0%
Rare Carat
Retailer 2
Retailer 3
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Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
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Retailer 17
November 6, 2026
Retailer 13£248 GBP
Retailer 7£288 GBP
Retailer 17£308 GBP
Retailer 3£342 GBP
Retailer 14£420 GBP
Retailer 2£425 GBP
Retailer 15£494 GBP
Retailer 5£496 GBP
Retailer 10£544 GBP
Retailer 16£545 GBP
Retailer 4£718 GBP
Retailer 12£902 GBP
Retailer 6£989 GBP
Retailer 11£1,232 GBP
Rare Carat£1,315 GBP
Retailer 9£2,355 GBP
Retailer 8£3,170 GBP

11 data points across 17 retailers

15 retailers£248 GBP to £1,315 GBP

A
Cheapest Retailer
-
£248 GBP
A
Retailer 2
-
£288 GBP
View
A
Retailer 3
-
£308 GBP
View
A
Retailer 4
-
£342 GBP
View
A
Retailer 5
-
£420 GBP
View
A
Retailer 6
-
£425 GBP
View
Retailer 7
-
£494 GBP
View
Price last confirmed 8 days ago
B+
Retailer 8
-
£496 GBP
View
A
Retailer 9
-
£544 GBP
View
A
Retailer 10
-
£545 GBP
View
A
Retailer 11
-
£718 GBP
View
B+
Retailer 12
-
£902 GBP
View
B+
Retailer 13
-
£989 GBP
View
B
Retailer 14
-
£1,232 GBP
View
Most Expensive
B
Rare Carat
KI4514694KF668 · Nov 4
£1,315 GBP
$1,770 USD
View
14 more retailers have this diamond
Prices start from £248 GBPSave up to £1,067 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.

A
3.10ct Round
£248 GBP