CaratHunter
Plans
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 $549 AUD
As of November 6, 2026
Save $3,468 AUD (86%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $4,017 AUD 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 $549 to $4,017, a $3,468 spread on the same certified stone. Brilliant Earth lists it at $4,017. 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

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $4,017 AUD|Low: $549 AUD|High: $4,017 AUD|Avg: $2,348 AUD
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
November 4, 2026
Retailer 3$549 AUD
Retailer 2$1,129 AUD
Retailer 4$3,093 AUD
Brilliant Earth$4,017 AUD

18 data points across 4 retailers

4 retailers$549 AUD to $4,017 AUD

A
Cheapest Retailer
-
$549 AUD
Final sale: no returns
A
Retailer 2
-
$1,129 AUD
View
Retailer 3
-
$3,093 AUD
View
Price last confirmed 10 days ago
Most Expensive
B
Brilliant Earth
21744514A · Nov 4
$4,017 AUD
$2,760 USD
View
3 more retailers have this diamond
Prices start from $549 AUDSave up to $3,468 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 Marquise
$549 AUD