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Round|Lab Grown|IGI

3.09ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG678518609

Shape and cutting style on the report: Round brilliant

Certificate IGI LG678518609

Diamond specifications and retailer prices

From $1,623 AUD
As of November 6, 2026
6 retailers carry this diamond
Most expensive: $2,628 AUD at Rare Carat · As of September 9, 2026
View at Rare Carat

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 LG678518609 or 678518609. Listed at 6 retailers as of November 6, 2026. 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 angle34.7°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG678518609
Dimensions9.41 × 9.36 × 5.67 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.41 mm9.36 mm3.09 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG678518609
Side View
Table 59.0%Crown 34.7°Girdle: MED-STKPavilion 40.4°Culet: NoneDepth 60.5%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $2,628 AUD|Low: $431 AUD|High: $3,171 AUD|Avg: $1,390 AUD
Rare Carat
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
Retailer 16
Retailer 17
October 21, 2026
Retailer 17$540 AUD
Retailer 12$604 AUD
Retailer 15$604 AUD
Retailer 5$660 AUD
Retailer 7$670 AUD
Retailer 4$900 AUD
Retailer 6$1,043 AUD
Retailer 10$1,050 AUD
Retailer 13$1,161 AUD
Retailer 14$1,217 AUD
Retailer 9$1,396 AUD
Retailer 16$1,536 AUD
Retailer 2$1,623 AUD
Retailer 3$2,151 AUD
Rare Carat$2,628 AUD
Retailer 11$2,643 AUD
Retailer 8$3,171 AUD

8 data points across 17 retailers

6 retailers

Retailer 1
-
$540 AUD
Price last confirmed 44 days ago
Retailer 2
-
$604 AUD
View
Price last confirmed 44 days ago
Retailer 3
-
$660 AUD
View
Price last confirmed 45 days ago
B+
Retailer 4
-
$1,623 AUD
View
Retailer 5
-
$2,151 AUD
View
Price last confirmed 46 days ago
Most Expensive
Rare Carat
KL6095186CC678 · Sep 9
$2,628 AUD
$1,840 USD
View
Price last confirmed 58 days ago
5 more retailers have this diamond
Prices start from $1,623 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.

B+
3.09ct Round
$1,623 AUD