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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 £1,602 GBP
$2,146 USD
As of November 2, 2026
Save £2,258 GBP (58%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £3,859 GBP 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 November 1, 2026, with prices from £1,602 to £3,859, a £2,258 spread on the same certified stone. Brilliance lists it at £3,859. 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
Colour
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

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: £3,859 GBP|Low: £1,602 GBP|High: £3,859 GBP|Avg: £3,163 GBP
Brilliance
Retailer 2
Retailer 3
Retailer 4
October 18, 2026
Retailer 4£1,602 GBP
Retailer 2£3,332 GBP
Retailer 3£3,835 GBP
Brilliance£3,859 GBP

3 data points across 4 retailers

4 retailers£1,602 GBP to £3,859 GBP

A
Cheapest Retailer
-
£1,602 GBP
$2,146 USD
B
Retailer 2
-
£3,332 GBP
$4,465 USD
View
B
Retailer 3
-
£3,835 GBP
$5,138 USD
View
Most Expensive
B
Brilliance
D24957292 · Nov 1
£3,859 GBP
$5,171 USD
View
3 more retailers have this diamond
Prices start from £1,602 GBPSave up to £2,258 GBP

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
£1,602 GBP