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Marquise|Lab Grown|IGI

3.90ct G VS1 Marquise Lab Grown Diamond

EX • G/VS1 • IGI LG841645537

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG841645537

Diamond specifications and retailer prices

From $741 AUD
$519 USD
As of November 1, 2026
Save $4,482 AUD (86%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: $5,222 AUD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 3.9ct lab-grown marquise diamond

This 3.9ct lab-grown marquise sits in the three to five carat band, graded G colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG841645537 or 841645537. Listed at 3 retailers as of October 29, 2026, with prices from $741 to $5,222, a $4,482 spread on the same certified stone. Brilliant Earth lists it at $5,222. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

3.90
Carat
G
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.3°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG841645537
Dimensions16.21 × 8.31 × 5.13 mm
L/W Ratio1.95
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
16.21 mm8.31 mm3.90 ctG / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG841645537
Side View
Table 62.0%Crown 36.3°Girdle: MED-STKPavilion 40.3°Culet: NoneDepth 61.7%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 1
Current: $5,222 AUD|Low: $731 AUD|High: $5,222 AUD|Avg: $2,750 AUD
Brilliant Earth
Retailer 2
Retailer 3
November 2, 2026
Retailer 3$741 AUD
Retailer 2$1,408 AUD
Brilliant Earth$5,222 AUD

27 data points across 3 retailers

3 retailers$741 AUD to $5,222 AUD

A
Cheapest Retailer
-
$741 AUD
$519 USD
Final sale: no returns
A
Retailer 2
-
$1,408 AUD
£777 GBP
View
Most Expensive
B
Brilliant Earth
21706530A · Oct 29
$5,222 AUD
$3,660 USD
View
2 more retailers have this diamond
Prices start from $741 AUDSave up to $4,482 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
3.90ct Marquise
$741 AUD