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Marquise|Lab Grown|IGI

6.31ct G VS2 Marquise Lab Grown Diamond

ID • G/VS2 • IGI LG636494604

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG636494604

Diamond specifications and retailer prices

From $2,146 USD
As of October 31, 2026
Save $3,025 USD (58%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $5,171 USD at Brilliance · As of November 1, 2026
View at Brilliance

About this 6.31ct lab-grown marquise diamond

This 6.31ct 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 LG636494604 or 636494604. Listed at 4 retailers as of October 31, 2026, with prices from $2,146 to $5,171, a $3,025 spread on the same certified stone. Brilliance lists it at $5,171. 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

6.31
Carat
G
Color
VS2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.7°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG636494604
Dimensions18.94 × 9.60 × 6.02 mm
L/W Ratio1.97
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
18.94 mm9.60 mm6.31 ctG / VS2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG636494604
Side View
Table 60.0%Crown 35.7°Girdle: MED-STKPavilion 40.5°Culet: NoneDepth 62.7%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 31
Current: $5,171 USD|Low: $2,146 USD|High: $5,171 USD|Avg: $4,237 USD
Brilliance
Retailer 2
Retailer 3
Retailer 4
October 18, 2026
Retailer 4$2,146 USD
Retailer 2$4,465 USD
Retailer 3$5,138 USD
Brilliance$5,171 USD

3 data points across 4 retailers

4 retailers$2,146 USD to $5,171 USD

A
Cheapest Retailer
-
$2,146 USD
B
Retailer 2
-
$4,465 USD
View
B
Retailer 3
-
$5,138 USD
View
Most Expensive
B
Brilliance
D24957292 · Nov 1
$5,171 USD
View
3 more retailers have this diamond
Prices start from $2,146 USDSave up to $3,025 USD

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
6.31ct Marquise
$2,146 USD