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Radiant|Lab Grown|IGI

3.90ct D VS1 Radiant Lab Grown Diamond

EX • D/VS1 • IGI LG774634791

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

Certificate IGI LG774634791

Diamond specifications and retailer prices

From £480 GBP
$643 USD
As of October 29, 2026
Save £3,532 GBP (88%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £4,012 GBP at Frank Darling · As of October 29, 2026
View at Frank Darling

About this 3.9ct lab-grown radiant diamond

This 3.9ct 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 LG774634791 or 774634791. Listed at 5 retailers as of October 29, 2026, with prices from £480 to £4,012, a £3,532 spread on the same certified stone. Frank Darling lists it at £4,012. 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

3.90
Carat
D
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle45.8°
Pavilion angle35.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG774634791
Dimensions7.80 × 7.80 × 11.01 mm
L/W Ratio1.00
Culet sizePointed
Top View
7.80 mm7.80 mm3.90 ctD / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG774634791
Side View
Table 67.0%Crown 45.8°Girdle: MediumPavilion 35.6°Culet: NoneDepth 67.3%

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: Oct 29
Current: £4,012 GBP|Low: £320 GBP|High: £4,247 GBP|Avg: £1,810 GBP|-5.4%
Frank Darling
Retailer 2
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Retailer 7
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Retailer 15
October 27, 2026
Retailer 2£480 GBP
Retailer 12£500 GBP
Retailer 8£663 GBP
Retailer 4£704 GBP
Retailer 11£839 GBP
Retailer 6£1,187 GBP
Retailer 5£1,188 GBP
Retailer 15£1,490 GBP
Retailer 3£1,684 GBP
Retailer 10£1,781 GBP
Retailer 13£1,865 GBP
Retailer 9£2,780 GBP
Retailer 14£3,567 GBP
Frank Darling£4,012 GBP
Retailer 7£4,247 GBP

17 data points across 15 retailers

5 retailers£480 GBP to £4,012 GBP

A
Cheapest Retailer
-
£480 GBP
$643 USD
Final sale: no returns
B+
Retailer 2
-
£663 GBP
$888 USD
View
Retailer 3
-
£1,781 GBP
$2,386 USD
View
Price last confirmed 25 days ago
Retailer 4
-
£2,780 GBP
$3,725 USD
View
Price last confirmed 12 days ago
Most Expensive
B
Frank Darling
100751875740KD · Oct 29
£4,012 GBP
$5,375 USD
View
4 more retailers have this diamond
Prices start from £480 GBPSave up to £3,532 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
3.90ct Radiant
£480 GBP