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Radiant|Lab Grown|IGI

3.91ct D VS1 Radiant Lab Grown Diamond

EX • D/VS1 • IGI LG822611050

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG822611050

Diamond specifications and retailer prices

From £440 GBP
$590 USD
As of October 29, 2026
Save £353 GBP (44%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £2,929 GBP at Rare Carat · As of October 14, 2026
View at Rare Carat

About this 3.91ct lab-grown radiant diamond

This 3.91ct lab-grown radiant sits in the three to five carat band, graded D colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG822611050 or 822611050. Listed at 3 retailers as of October 29, 2026, with a 80% 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

3.91
Carat
D
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle56.4°
Pavilion angle36.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG822611050
Dimensions10.96 × 7.83 × 5.22 mm
L/W Ratio1.40
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.96 mm7.83 mm3.91 ctD / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG822611050
Side View
Table 66.0%Crown 56.4°Girdle: MediumPavilion 36.9°Culet: NoneDepth 66.7%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 29
Current: £2,929 GBP|Low: £322 GBP|High: £2,933 GBP|Avg: £1,209 GBP|-0.1%
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 30, 2026
Retailer 3£440 GBP
Retailer 4£578 GBP
Retailer 5£755 GBP
Retailer 2£793 GBP
Retailer 6£1,524 GBP
Retailer 7£1,626 GBP
Retailer 8£1,704 GBP
Rare Carat£2,929 GBP

37 data points across 8 retailers

3 retailers£440 GBP to £793 GBP

A
Cheapest Retailer
-
£440 GBP
$590 USD
Final sale: no returns
A
Retailer 2
-
£793 GBP
View
Most Expensive
Rare Carat
822611050 · Oct 14
£2,929 GBP
$3,925 USD
View
Price last confirmed 16 days ago
2 more retailers have this diamond
Prices start from £440 GBPSave up to £353 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
3.91ct Radiant
£440 GBP