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 $1,280 USD

As of October 29, 2026

Save $3,004 USD (70%) vs most expensive(unlock to see where)

16 retailers carry this diamond

Most expensive: $6,020 USD 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

Color

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: $3,080 USD|Low: $1,270 USD|High: $4,322 USD|Avg: $2,637 USD|-0.5%

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 29, 2026

Retailer 12$1,280 USD

Retailer 4$1,326 USD

Retailer 8$1,500 USD

Retailer 7$2,108 USD

Retailer 10$2,246 USD

Retailer 3$2,486 USD

Retailer 13$2,654 USD

Retailer 5$2,846 USD

Retailer 2$2,993 USD

Retailer 1$3,080 USD

Retailer 9$3,658 USD

Retailer 11$3,840 USD

Retailer 6$4,284 USD

35 data points across 13 retailers

16 retailers$1,280 USD to $4,284 USD

Retailer 1

$1,143 USD

Price last confirmed 8 days ago

Retailer 2

$1,244 USD

View

Price last confirmed 9 days ago

Retailer 3

$1,280 USD

View

Final sale: no returns

Retailer 4

$1,326 USD

View

Price last confirmed 10 days ago

Retailer 5

$1,500 USD

View

B+

Retailer 6

$2,108 USD

View

B+

Retailer 7

$2,246 USD

View

Retailer 8

$2,486 USD

View

Price last confirmed 10 days ago

B+

Retailer 9

$2,654 USD

View

Retailer 10

$2,846 USD

A$4,378 AUD

View

Price last confirmed 21 days ago

Retailer 11

$2,993 USD

A$4,604 AUD

View

Price last confirmed 8 days ago

B+

Retailer 12

$3,080 USD

ZAR 49,753 ZAR

View

Retailer 13

$3,658 USD

£2,880 GBP

View

Retailer 14

$3,840 USD

View

Retailer 15

$4,284 USD

£3,373 GBP

View

Most Expensive

Queensmith

LG728501454 · Oct 16

$6,020 USD

£4,740 GBP

View

Price last confirmed 13 days ago

15 more retailers have this diamond

Prices start from $1,280 USDSave up to $3,004 USD

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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