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Marquise|Lab Grown|IGI

6.18ct G VS2 Marquise Lab Grown Diamond

ID • G/VS2

Diamond specifications and retailer prices

From $1,866 AUD
£1,030 GBP
As of November 2, 2026
Save $4,677 AUD (71%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: $6,542 AUD at Blue Nile · As of October 31, 2026
View at Blue Nile

About this 6.18ct lab-grown marquise diamond

This 6.18ct lab-grown marquise sits in the over five carat band, graded G colour (near-colourless) and VS2 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI. Listed at 2 retailers as of October 31, 2026, with prices from $1,866 to $6,542, a $4,677 spread on the same certified stone. Blue Nile lists it at $6,542. 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

6.18
Carat
G
Colour
VS2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabIGI
Dimensions19.43 × 9.60 × 5.83 mm
L/W Ratio2.02
Top View
19.43 mm9.60 mm6.18 ctG / VS2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI
Side View
Table 58.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 60.7%

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: Nov 2
Current: $6,542 AUD|Low: $1,411 AUD|High: $6,542 AUD|Avg: $3,018 AUD
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 2, 2026
Retailer 4$1,411 AUD
Retailer 5$1,535 AUD
Retailer 2$1,866 AUD
Retailer 3$3,386 AUD
Blue Nile$6,542 AUD

34 data points across 5 retailers

2 retailers$1,866 AUD to $6,542 AUD

A
Cheapest Retailer
-
$1,866 AUD
£1,030 GBP
Most Expensive
B
Blue Nile
26529112 · Oct 31
$6,542 AUD
$4,585 USD
View
1 more retailer has this diamond
Prices start from $1,866 AUDSave up to $4,677 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
6.18ct Marquise
$1,866 AUD