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Round|Lab Grown|IGI

3.09ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG821689508

Shape and cutting style on the report: Round brilliant

Certificate IGI LG821689508

Diamond specifications and retailer prices

From $601 AUD
As of November 5, 2026
Save $4,998 AUD (89%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $5,600 AUD at Brilliant Earth · As of November 5, 2026
View at Brilliant Earth

About this 3.09ct lab-grown round diamond

This 3.09ct 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 LG821689508 or 821689508. Listed at 17 retailers as of November 5, 2026, with prices from $601 to $5,600, a $4,998 spread on the same certified stone. Brilliant Earth lists it at $5,600. 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

3.09
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.2°
Pavilion angle41.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG821689508
Dimensions9.36 × 9.40 × 5.74 mm
L/W Ratio1.00
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.36 mm9.40 mm3.09 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG821689508
Side View
Table 58.0%Crown 33.2°Girdle: MediumPavilion 41.2°Culet: NoneDepth 61.2%

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: $5,600 AUD|Low: $601 AUD|High: $5,600 AUD|Avg: $1,800 AUD
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 11$601 AUD
Retailer 4$746 AUD
Retailer 8$957 AUD
Retailer 10$1,043 AUD
Retailer 12$1,177 AUD
Retailer 6$1,213 AUD
Retailer 2$1,271 AUD
Retailer 3$1,419 AUD
Retailer 9$2,093 AUD
Retailer 7$2,493 AUD
Retailer 5$2,731 AUD
Brilliant Earth$5,600 AUD

40 data points across 12 retailers

17 retailers$601 AUD to $5,600 AUD

A
Cheapest Retailer
-
$601 AUD
Retailer 2
-
$601 AUD
View
Price last confirmed 45 days ago
A
Retailer 3
-
$674 AUD
View
Retailer 4
-
$736 AUD
View
Price last confirmed 45 days ago
A
Retailer 5
-
$746 AUD
View
Retailer 6
-
$746 AUD
View
Price last confirmed 12 days ago
A
Retailer 7
-
$957 AUD
View
B+
Retailer 8
-
$1,177 AUD
View
A
Retailer 9
-
$1,213 AUD
View
Retailer 10
-
$1,271 AUD
View
A
Retailer 11
-
$1,419 AUD
View
B
Retailer 12
-
$2,093 AUD
View
Retailer 13
-
$2,398 AUD
View
Price last confirmed 46 days ago
B
Retailer 14
-
$2,398 AUD
View
B
Retailer 15
-
$2,493 AUD
View
B
Retailer 16
-
$2,731 AUD
View
Most Expensive
B
Brilliant Earth
21445474A · Nov 5
$5,600 AUD
$3,920 USD
View
16 more retailers have this diamond
Prices start from $601 AUDSave up to $4,998 AUD

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
3.09ct Round
$601 AUD