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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 €1,012 EUR
As of November 6, 2026
6 retailers carry this diamond
Most expensive: €1,639 EUR 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: €1,639 EUR|Low: €269 EUR|High: €1,978 EUR|Avg: €867 EUR
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€337 EUR
Retailer 12€377 EUR
Retailer 15€377 EUR
Retailer 5€412 EUR
Retailer 7€418 EUR
Retailer 4€561 EUR
Retailer 6€650 EUR
Retailer 10€655 EUR
Retailer 13€724 EUR
Retailer 14€759 EUR
Retailer 9€870 EUR
Retailer 16€958 EUR
Retailer 2€1,012 EUR
Retailer 3€1,342 EUR
Rare Carat€1,639 EUR
Retailer 11€1,648 EUR
Retailer 8€1,978 EUR

8 data points across 17 retailers

6 retailers

Retailer 1
-
€337 EUR
Price last confirmed 44 days ago
Retailer 2
-
€377 EUR
View
Price last confirmed 44 days ago
Retailer 3
-
€412 EUR
View
Price last confirmed 45 days ago
B+
Retailer 4
-
€1,012 EUR
View
Retailer 5
-
€1,342 EUR
View
Price last confirmed 46 days ago
Most Expensive
Rare Carat
KL6095186CC678 · Sep 9
€1,639 EUR
$1,840 USD
View
Price last confirmed 58 days ago
5 more retailers have this diamond
Prices start from €1,012 EUR

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
€1,012 EUR