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Round|Lab Grown|IGI

2.91ct K SI1 Round Lab Grown Diamond

ID • K/SI1 • IGI LG485161730

Shape and cutting style on the report: Round brilliant

Certificate IGI LG485161730

Diamond specifications and retailer prices

From £1,881 GBP
As of November 5, 2026
Save £3,945 GBP (68%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £5,826 GBP at MOH London · As of November 5, 2026
View at MOH London

About this 2.91ct lab-grown round diamond

This 2.91ct lab-grown round sits in the two to three carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG485161730 or 485161730. Listed at 10 retailers as of November 5, 2026, with prices from £1,881 to £5,826, a £3,945 spread on the same certified stone. MOH London lists it at £5,826. 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

2.91
Carat
K
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.1°
Pavilion angle40.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG485161730
Dimensions9.09 × 9.13 × 5.58 mm
L/W Ratio1.00
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
9.09 mm9.13 mm2.91 ctK / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG485161730
Side View
Table 59.0%Crown 36.1°Girdle: MED-STKPavilion 40.1°Culet: NoneDepth 61.2%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 5
Current: £5,826 GBP|Low: £1,805 GBP|High: £5,920 GBP|Avg: £2,982 GBP|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 5, 2026
Retailer 5£1,881 GBP
Retailer 2£2,115 GBP
Retailer 6£2,181 GBP
Retailer 8£2,181 GBP
Retailer 3£2,184 GBP
Retailer 9£2,681 GBP
Retailer 4£3,202 GBP
Retailer 7£3,399 GBP
MOH London£5,826 GBP

39 data points across 9 retailers

10 retailers£1,881 GBP to £5,826 GBP

A
Cheapest Retailer
-
£1,881 GBP
A
Retailer 2
-
£2,046 GBP
View
A
Retailer 3
-
£2,115 GBP
View
Retailer 4
-
£2,181 GBP
View
Price last confirmed 25 days ago
A
Retailer 5
-
£2,181 GBP
View
A
Retailer 6
-
£2,184 GBP
View
B
Retailer 7
-
£2,999 GBP
View
B
Retailer 8
-
£3,202 GBP
View
B
Retailer 9
-
£3,399 GBP
View
Most Expensive
B
MOH London
LG485161730 · Nov 5
£5,826 GBP
View
9 more retailers have this diamond
Prices start from £1,881 GBPSave up to £3,945 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
2.91ct Round
£1,881 GBP