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Marquise|Lab Grown|IGI

3.40ct G VS1 Marquise Lab Grown Diamond

EX • G/VS1 • IGI LG809650188

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG809650188

Diamond specifications and retailer prices

From $658 AUD
$462 USD
As of November 1, 2026
Save $3,862 AUD (85%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $4,684 AUD at Brilliant Earth · As of October 1, 2026
View at Brilliant Earth

About this 3.4ct lab-grown marquise diamond

This 3.4ct 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 LG809650188 or 809650188. Listed at 6 retailers as of October 31, 2026, with a 587% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

3.40
Carat
G
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.9°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG809650188
Dimensions16.18 × 7.69 × 4.71 mm
L/W Ratio2.10
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
16.18 mm7.69 mm3.40 ctG / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG809650188
Side View
Table 62.0%Crown 35.9°Girdle: MED-STKPavilion 40.3°Culet: NoneDepth 61.2%

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 1
Current: $4,684 AUD|Low: $658 AUD|High: $4,684 AUD|Avg: $2,195 AUD
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 31, 2026
Retailer 6$658 AUD
Retailer 8$931 AUD
Retailer 12$1,089 AUD
Retailer 10$1,200 AUD
Retailer 11$1,366 AUD
Retailer 5$1,723 AUD
Retailer 13$1,780 AUD
Retailer 3$2,154 AUD
Retailer 4$2,321 AUD
Retailer 2$2,410 AUD
Retailer 9$3,666 AUD
Retailer 7$4,520 AUD
Brilliant Earth$4,684 AUD

18 data points across 13 retailers

6 retailers$658 AUD to $4,520 AUD

A
Cheapest Retailer
-
$658 AUD
$462 USD
Final sale: no returns
B+
Retailer 2
-
$931 AUD
$654 USD
View
B+
Retailer 3
-
$2,410 AUD
$1,693 USD
View
B
Retailer 4
-
$3,666 AUD
$2,575 USD
View
B
Retailer 5
-
$4,520 AUD
$3,175 USD
View
Most Expensive
Brilliant Earth
20335210A · Oct 1
$4,684 AUD
$3,290 USD
View
Price last confirmed 31 days ago
5 more retailers have this diamond
Prices start from $658 AUDSave up to $3,862 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
3.40ct Marquise
$658 AUD