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Marquise|Lab Grown|IGI

3.10ct E SI1 Marquise Lab Grown Diamond

EX • E/SI1 • IGI LG841603280

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG841603280

Diamond specifications and retailer prices

From $554 AUD
$389 USD
As of October 29, 2026
Save $4,116 AUD (88%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $4,669 AUD at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 3.1ct lab-grown marquise diamond

This 3.1ct lab-grown marquise sits in the three to five carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG841603280 or 841603280. Listed at 4 retailers as of October 29, 2026, with prices from $554 to $4,669, a $4,116 spread on the same certified stone. Brilliant Earth lists it at $4,669. 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

3.10
Carat
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.7°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG841603280
Dimensions14.38 × 7.66 × 4.94 mm
L/W Ratio1.88
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
14.38 mm7.66 mm3.10 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG841603280
Side View
Table 59.0%Crown 36.7°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 64.5%

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: Oct 29
Current: $4,669 AUD|Low: $554 AUD|High: $6,662 AUD|Avg: $3,212 AUD|-29.9%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
October 30, 2026
Retailer 3$554 AUD
Retailer 2$1,139 AUD
Retailer 4$3,958 AUD
Brilliant Earth$4,669 AUD

26 data points across 4 retailers

4 retailers$554 AUD to $4,669 AUD

A
Cheapest Retailer
-
$554 AUD
$389 USD
Final sale: no returns
A
Retailer 2
-
$1,139 AUD
£630 GBP
View
Retailer 3
-
$3,958 AUD
$2,780 USD
View
Price last confirmed 10 days ago
Most Expensive
B
Brilliant Earth
21612819A · Oct 30
$4,669 AUD
$3,280 USD
View
3 more retailers have this diamond
Prices start from $554 AUDSave up to $4,116 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
3.10ct Marquise
$554 AUD