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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 $359 USD
As of November 1, 2026
Save $1,382 USD (79%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $3,170 USD 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 1, 2026, with a 385% 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
Color
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

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 1
Current: $3,170 USD|Low: $345 USD|High: $3,170 USD|Avg: $954 USD
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
Retailer 15
November 2, 2026
Retailer 15$359 USD
Retailer 4$417 USD
Retailer 5$446 USD
Retailer 14$446 USD
Retailer 2$657 USD
Retailer 6$715 USD
Retailer 10$740 USD
Retailer 13$744 USD
Retailer 7$756 USD
Retailer 8$801 USD
Retailer 11$1,307 USD
Retailer 3$1,433 USD
Retailer 12$1,625 USD
Retailer 9$1,741 USD
Brilliant Earth$3,170 USD

40 data points across 15 retailers

15 retailers$359 USD to $1,741 USD

A
Cheapest Retailer
-
$359 USD
A
Retailer 2
-
$417 USD
View
Retailer 3
-
$446 USD
View
Price last confirmed 8 days ago
A
Retailer 4
-
$446 USD
View
A
Retailer 5
-
$657 USD
£518 GBP
View
B+
Retailer 6
-
$715 USD
View
A
Retailer 7
-
$740 USD
A$1,138 AUD
View
A
Retailer 8
-
$756 USD
View
A
Retailer 9
-
$801 USD
£631 GBP
View
B+
Retailer 10
-
$895 USD
View
B
Retailer 11
-
$1,307 USD
View
B+
Retailer 12
-
$1,433 USD
View
B
Retailer 13
-
$1,625 USD
View
B
Retailer 14
-
$1,741 USD
£1,371 GBP
View
Most Expensive
Brilliant Earth
15806241A · Oct 18
$3,170 USD
View
Price last confirmed 14 days ago
14 more retailers have this diamond
Prices start from $359 USDSave up to $1,382 USD

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
$359 USD