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Radiant|Lab Grown|IGI

3.91ct D VS1 Radiant Lab Grown Diamond

EX • D/VS1 • IGI LG777614739

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

Certificate IGI LG777614739

Diamond specifications and retailer prices

From £481 GBP
$645 USD
As of October 29, 2026
Save £3,541 GBP (88%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £4,022 GBP at Frank Darling · As of October 28, 2026
View at Frank Darling

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 LG777614739 or 777614739. Listed at 6 retailers as of October 28, 2026, with prices from £481 to £4,022, a £3,541 spread on the same certified stone. Frank Darling lists it at £4,022. 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 angle44.4°
Pavilion angle35.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG777614739
Dimensions10.81 × 7.86 × 5.35 mm
L/W Ratio1.38
Culet sizePointed
Top View
10.81 mm7.86 mm3.91 ctD / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG777614739
Side View
Table 66.0%Crown 44.4°Girdle: Slightly ThickPavilion 35.5°Culet: NoneDepth 68.1%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29
Current: £4,022 GBP|Low: £321 GBP|High: £4,515 GBP|Avg: £1,840 GBP|-0.0%
Frank Darling
Retailer 2
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Retailer 5
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Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
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Retailer 15
October 28, 2026
Retailer 2£481 GBP
Retailer 11£601 GBP
Retailer 8£664 GBP
Retailer 14£705 GBP
Retailer 12£841 GBP
Retailer 6£1,190 GBP
Retailer 15£1,524 GBP
Retailer 3£1,624 GBP
Retailer 4£1,702 GBP
Retailer 10£1,785 GBP
Retailer 7£2,327 GBP
Retailer 9£2,780 GBP
Retailer 13£3,575 GBP
Frank Darling£4,022 GBP
Retailer 5£4,515 GBP

17 data points across 15 retailers

6 retailers£481 GBP to £4,022 GBP

A
Cheapest Retailer
-
£481 GBP
$645 USD
Final sale: no returns
B+
Retailer 2
-
£664 GBP
$890 USD
View
Retailer 3
-
£1,785 GBP
$2,392 USD
View
Price last confirmed 25 days ago
Retailer 4
-
£2,327 GBP
A$4,796 AUD
View
Price last confirmed 118 days ago
Retailer 5
-
£2,780 GBP
$3,725 USD
View
Price last confirmed 12 days ago
Most Expensive
B
Frank Darling
100752997414KD · Oct 28
£4,022 GBP
$5,389 USD
View
5 more retailers have this diamond
Prices start from £481 GBPSave up to £3,541 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
£481 GBP