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Marquise|Lab Grown|IGI

3.98ct G VS1 Marquise Lab Grown Diamond

EX • G/VS1 • IGI LG847606300

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG847606300

Diamond specifications and retailer prices

From £399 GBP
$535 USD
As of November 1, 2026
Save £2,198 GBP (85%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £2,597 GBP at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 3.98ct lab-grown marquise diamond

This 3.98ct 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 LG847606300 or 847606300. Listed at 4 retailers as of October 30, 2026, with prices from £399 to £2,597, a £2,198 spread on the same certified stone. Brilliant Earth lists it at £2,597. 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

3.98
Carat
G
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.9°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG847606300
Dimensions17.01 × 8.13 × 5.09 mm
L/W Ratio2.09
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
17.01 mm8.13 mm3.98 ctG / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG847606300
Side View
Table 58.0%Crown 35.9°Girdle: MED-STKPavilion 40.3°Culet: NoneDepth 62.6%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 1
Current: £760 GBP|Low: £399 GBP|High: £773 GBP|Avg: £629 GBP|-1.7%
Retailer 1
Retailer 2
November 2, 2026
Retailer 2£399 GBP
Retailer 1£760 GBP

12 data points across 2 retailers

4 retailers£399 GBP to £2,597 GBP

A
Cheapest Retailer
-
£399 GBP
$535 USD
Final sale: no returns
A
Retailer 2
-
£760 GBP
View
B
Retailer 3
-
£1,989 GBP
$2,665 USD
View
Most Expensive
B
Brilliant Earth
22306916A · Oct 30
£2,597 GBP
$3,480 USD
View
3 more retailers have this diamond
Prices start from £399 GBPSave up to £2,198 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
3.98ct Marquise
£399 GBP