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Round|Lab Grown|IGI

2.91ct F SI2 Round Lab Grown Diamond

EX • F/SI2 • IGI LG629499970

Shape and cutting style on the report: Round brilliant

Certificate IGI LG629499970

Diamond specifications and retailer prices

From £267 GBP
As of November 5, 2026
Save £1,024 GBP (79%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £2,355 GBP at Brilliant Earth · As of October 18, 2026
View at Brilliant Earth

About this 2.91ct lab-grown round diamond

This 2.91ct lab-grown round sits in the two to three carat band, graded F colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG629499970 or 629499970. Listed at 15 retailers as of November 5, 2026, with a 384% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
F
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.6°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG629499970
Dimensions9.26 × 9.20 × 5.46 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
9.26 mm9.20 mm2.91 ctF / SI2
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG629499970
Side View
Table 62.0%Crown 33.6°Girdle: MED-STKPavilion 40.3°Culet: NoneDepth 59.2%

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: £2,355 GBP|Low: £256 GBP|High: £2,355 GBP|Avg: £742 GBP
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
November 6, 2026
Retailer 10£267 GBP
Retailer 11£310 GBP
Retailer 5£331 GBP
Retailer 7£331 GBP
Retailer 2£485 GBP
Retailer 6£531 GBP
Retailer 13£549 GBP
Retailer 4£553 GBP
Retailer 8£585 GBP
Retailer 14£971 GBP
Retailer 9£1,065 GBP
Retailer 3£1,207 GBP
Retailer 12£1,291 GBP
Brilliant Earth£2,355 GBP

37 data points across 14 retailers

15 retailers£267 GBP to £1,291 GBP

A
Cheapest Retailer
-
£267 GBP
A
Retailer 2
-
£310 GBP
View
Retailer 3
-
£331 GBP
View
Price last confirmed 12 days ago
A
Retailer 4
-
£331 GBP
View
A
Retailer 5
-
£485 GBP
View
B+
Retailer 6
-
£531 GBP
View
A
Retailer 7
-
£549 GBP
View
A
Retailer 8
-
£562 GBP
View
A
Retailer 9
-
£585 GBP
View
B+
Retailer 10
-
£665 GBP
View
B
Retailer 11
-
£971 GBP
View
B+
Retailer 12
-
£1,065 GBP
View
B
Retailer 13
-
£1,207 GBP
View
B
Retailer 14
-
£1,291 GBP
View
Most Expensive
Brilliant Earth
15806241A · Oct 18
£2,355 GBP
$3,170 USD
View
Price last confirmed 18 days ago
14 more retailers have this diamond
Prices start from £267 GBPSave up to £1,024 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
£267 GBP