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Marquise|Lab Grown|IGI

1.60ct E SI1 Marquise Lab Grown Diamond

EX • E/SI1 • IGI LG839697358

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG839697358

Diamond specifications and retailer prices

From $326 AUD
$229 USD
As of October 30, 2026
Save $1,382 AUD (81%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: $1,708 AUD at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 1.6ct lab-grown marquise diamond

This 1.6ct lab-grown marquise sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG839697358 or 839697358. Listed at 3 retailers as of October 30, 2026, with prices from $326 to $1,708, a $1,382 spread on the same certified stone. Brilliant Earth lists it at $1,708. 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

1.60
Carat
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.8°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG839697358
Dimensions11.71 × 6.06 × 3.91 mm
L/W Ratio1.93
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.71 mm6.06 mm1.60 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG839697358
Side View
Table 62.0%Crown 36.8°Girdle: MED-STKPavilion 40.9°Culet: NoneDepth 64.5%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 30
Current: $1,708 AUD|Low: $326 AUD|High: $2,577 AUD|Avg: $1,331 AUD|-33.7%
Brilliant Earth
Retailer 2
Retailer 3
October 30, 2026
Retailer 3$326 AUD
Retailer 2$694 AUD
Brilliant Earth$1,708 AUD

26 data points across 3 retailers

3 retailers$326 AUD to $1,708 AUD

A
Cheapest Retailer
-
$326 AUD
$229 USD
Final sale: no returns
A
Retailer 2
-
$694 AUD
£384 GBP
View
Most Expensive
B
Brilliant Earth
21613342A · Oct 30
$1,708 AUD
$1,200 USD
View
2 more retailers have this diamond
Prices start from $326 AUDSave up to $1,382 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
1.60ct Marquise
$326 AUD