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Round|Lab Grown|IGI

3.40ct K SI1 Round Lab Grown Diamond

ID • K/SI1 • IGI LG492110392

Shape and cutting style on the report: Round brilliant

Certificate IGI LG492110392

Diamond specifications and retailer prices

From £3,846 GBP
As of November 5, 2026
Save £5,208 GBP (58%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £9,054 GBP at MOH London · As of November 5, 2026
View at MOH London

About this 3.4ct lab-grown round diamond

This 3.4ct lab-grown round sits in the three to five carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG492110392 or 492110392. Listed at 9 retailers as of November 5, 2026, with prices from £3,846 to £9,054, a £5,208 spread on the same certified stone. MOH London lists it at £9,054. 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

3.40
Carat
K
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle40.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG492110392
Dimensions9.68 × 9.63 × 5.83 mm
L/W Ratio1.01
Girdle conditionFaceted
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
9.68 mm9.63 mm3.40 ctK / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG492110392
Side View
Table 58.5%Crown 34.5°Girdle: MED-STKPavilion 40.1°Culet: NoneDepth 60.3%

Caratlytics Score

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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: £9,054 GBP|Low: £3,846 GBP|High: £9,199 GBP|Avg: £6,023 GBP|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 5, 2026
Retailer 4£3,846 GBP
Retailer 2£4,462 GBP
Retailer 6£4,793 GBP
Retailer 3£5,594 GBP
Retailer 5£6,893 GBP
MOH London£9,054 GBP

18 data points across 6 retailers

9 retailers£3,846 GBP to £9,054 GBP

A
Cheapest Retailer
-
£3,846 GBP
A
Retailer 2
-
£4,031 GBP
View
Retailer 3
-
£4,461 GBP
View
Price last confirmed 25 days ago
B+
Retailer 4
-
£4,461 GBP
View
B+
Retailer 5
-
£4,462 GBP
View
B+
Retailer 6
-
£5,296 GBP
View
B
Retailer 7
-
£5,594 GBP
View
B
Retailer 8
-
£6,893 GBP
View
Most Expensive
B
MOH London
LG492110392 · Nov 5
£9,054 GBP
View
8 more retailers have this diamond
Prices start from £3,846 GBPSave up to £5,208 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
3.40ct Round
£3,846 GBP