Radiant|Lab Grown|IGI

3.91ct D VS1 Radiant Lab Grown Diamond

ID • D/VS1 • IGI LG728501454

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

Certificate IGI LG728501454

Diamond specifications and retailer prices

From £955 GBP

$1,280 USD

As of October 29, 2026

Save £2,242 GBP (70%) vs most expensive(unlock to see where)

16 retailers carry this diamond

Most expensive: £4,493 GBP at Queensmith · As of October 16, 2026

View at Queensmith

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 LG728501454 or 728501454. Listed at 16 retailers as of October 29, 2026, with a 235% 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

Colour

VS1

Clarity

Ideal

Cut

Specifications

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle45.7°

Pavilion angle34.5°

OriginLab Grown

Grading LabIGI

CertificateIGI LG728501454

Dimensions11.21 × 11.21 × 7.70 mm

L/W Ratio1.00

Culet sizePointed

Cert comments

This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa

View IGI Report →View Loupe360 Video →

Top View

OriginLab Grown

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

CertificateIGI LG728501454

Side View

Caratlytics Score

How it works →

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: £1,950 GBP|Low: £948 GBP|High: £3,225 GBP|Avg: £1,970 GBP|+1.1%

Retailer 1

Retailer 2

Retailer 3

Retailer 4

Retailer 5

Retailer 6

Retailer 7

Retailer 8

Retailer 9

Retailer 10

Retailer 11

Retailer 12

Retailer 13

October 31, 2026

Retailer 13£955 GBP

Retailer 4£990 GBP

Retailer 9£1,119 GBP

Retailer 8£1,573 GBP

Retailer 11£1,676 GBP

Retailer 3£1,855 GBP

Retailer 1£1,950 GBP

Retailer 5£2,124 GBP

Retailer 2£2,233 GBP

Retailer 6£2,298 GBP

Retailer 10£2,730 GBP

Retailer 12£2,866 GBP

Retailer 7£3,197 GBP

35 data points across 13 retailers

16 retailers£955 GBP to £3,197 GBP

Retailer 1

£853 GBP

$1,143 USD

Price last confirmed 9 days ago

Retailer 2

£928 GBP

$1,244 USD

View

Price last confirmed 10 days ago

Retailer 3

£955 GBP

$1,280 USD

View

Final sale: no returns

Retailer 4

£990 GBP

$1,326 USD

View

Price last confirmed 11 days ago

Retailer 5

£1,119 GBP

$1,500 USD

View

B+

Retailer 6

£1,573 GBP

$2,108 USD

View

B+

Retailer 7

£1,676 GBP

$2,246 USD

View

Retailer 8

£1,855 GBP

$2,486 USD

View

Price last confirmed 10 days ago

B+

Retailer 9

£1,950 GBP

$2,613 USD

View

Retailer 10

£2,124 GBP

A$4,378 AUD

View

Price last confirmed 22 days ago

Retailer 11

£2,233 GBP

A$4,604 AUD

View

Price last confirmed 9 days ago

B+

Retailer 12

£2,298 GBP

ZAR 49,753 ZAR

View

Retailer 13

£2,730 GBP

View

Retailer 14

£2,866 GBP

$3,840 USD

View

Retailer 15

£3,197 GBP

View

Most Expensive

Queensmith

LG728501454 · Oct 16

£4,493 GBP

View

Price last confirmed 14 days ago

15 more retailers have this diamond

Prices start from £955 GBPSave up to £2,242 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.

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