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Marquise|Lab Grown|IGI

3.09ct F SI1 Marquise Lab Grown Diamond

EX • F/SI1 • IGI LG842648135

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG842648135

Diamond specifications and retailer prices

From $680 NZD
As of November 6, 2026
Save $4,299 NZD (86%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $4,979 NZD at Brilliant Earth · As of November 4, 2026
View at Brilliant Earth

About this 3.09ct lab-grown marquise diamond

This 3.09ct lab-grown marquise 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 LG842648135 or 842648135. Listed at 4 retailers as of November 4, 2026, with prices from $680 to $4,979, a $4,299 spread on the same certified stone. Brilliant Earth lists it at $4,979. 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
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.5°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG842648135
Dimensions15.19 × 7.44 × 4.72 mm
L/W Ratio2.04
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
15.19 mm7.44 mm3.09 ctF / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG842648135
Side View
Table 62.0%Crown 37.5°Girdle: MED-THKPavilion 40.3°Culet: NoneDepth 63.4%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 6
Current: $4,979 NZD|Low: $680 NZD|High: $4,979 NZD|Avg: $2,910 NZD
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
November 4, 2026
Retailer 3$680 NZD
Retailer 2$1,400 NZD
Retailer 4$3,833 NZD
Brilliant Earth$4,979 NZD

18 data points across 4 retailers

4 retailers$680 NZD to $4,979 NZD

A
Cheapest Retailer
-
$680 NZD
Final sale: no returns
A
Retailer 2
-
$1,400 NZD
View
Retailer 3
-
$3,833 NZD
View
Price last confirmed 10 days ago
Most Expensive
B
Brilliant Earth
21744514A · Nov 4
$4,979 NZD
$2,760 USD
View
3 more retailers have this diamond
Prices start from $680 NZDSave up to $4,299 NZD

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 Marquise
$680 NZD