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Round|Lab Grown|IGI

3.09ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG685591087

Shape and cutting style on the report: Round brilliant

Certificate IGI LG685591087

Diamond specifications and retailer prices

From €297 EUR
As of November 5, 2026
Save €1,258 EUR (81%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: €1,555 EUR at Rare Carat · As of November 4, 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 LG685591087 or 685591087. Listed at 13 retailers as of November 4, 2026, with prices from €297 to €1,555, a €1,258 spread on the same certified stone. Rare Carat lists it at €1,555. 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 angle34.4°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG685591087
Dimensions9.39 × 9.36 × 5.73 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.39 mm9.36 mm3.09 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG685591087
Side View
Table 58.0%Crown 34.4°Girdle: MED-STKPavilion 40.9°Culet: NoneDepth 61.1%

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 5
Current: €1,555 EUR|Low: €297 EUR|High: €3,867 EUR|Avg: €1,304 EUR|-3.6%
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
November 6, 2026
Retailer 11€297 EUR
Retailer 8€368 EUR
Retailer 3€410 EUR
Retailer 14€503 EUR
Retailer 2€509 EUR
Retailer 15€592 EUR
Retailer 5€593 EUR
Retailer 9€650 EUR
Retailer 4€857 EUR
Retailer 13€1,078 EUR
Retailer 10€1,182 EUR
Retailer 12€1,469 EUR
Rare Carat€1,555 EUR
Retailer 6€3,789 EUR
Retailer 7€3,867 EUR

10 data points across 15 retailers

13 retailers€297 EUR to €1,555 EUR

A
Cheapest Retailer
-
€297 EUR
A
Retailer 2
-
€368 EUR
View
A
Retailer 3
-
€410 EUR
View
A
Retailer 4
-
€503 EUR
View
A
Retailer 5
-
€509 EUR
View
Retailer 6
-
€592 EUR
View
Price last confirmed 8 days ago
B+
Retailer 7
-
€593 EUR
View
A
Retailer 8
-
€650 EUR
View
A
Retailer 9
-
€857 EUR
View
B+
Retailer 10
-
€1,078 EUR
View
B+
Retailer 11
-
€1,182 EUR
View
B
Retailer 12
-
€1,469 EUR
View
Most Expensive
B
Rare Carat
KI0875910KF685 · Nov 4
€1,555 EUR
$1,745 USD
View
12 more retailers have this diamond
Prices start from €297 EURSave up to €1,258 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.

A
3.09ct Round
€297 EUR