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 $1,822 AUD

$1,280 USD

As of October 29, 2026

Save $4,276 AUD (70%) vs most expensive(unlock to see where)

16 retailers carry this diamond

Most expensive: $8,570 AUD 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: $4,384 AUD|Low: $1,808 AUD|High: $6,153 AUD|Avg: $3,754 AUD|-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$1,822 AUD

Retailer 4$1,888 AUD

Retailer 8$2,135 AUD

Retailer 7$3,001 AUD

Retailer 10$3,197 AUD

Retailer 3$3,539 AUD

Retailer 13$3,778 AUD

Retailer 5$4,051 AUD

Retailer 2$4,260 AUD

Retailer 1$4,384 AUD

Retailer 9$5,207 AUD

Retailer 11$5,467 AUD

Retailer 6$6,098 AUD

35 data points across 13 retailers

16 retailers$1,822 AUD to $6,098 AUD

Retailer 1

$1,627 AUD

$1,143 USD

Price last confirmed 9 days ago

Retailer 2

$1,771 AUD

$1,244 USD

View

Price last confirmed 10 days ago

Retailer 3

$1,822 AUD

$1,280 USD

View

Final sale: no returns

Retailer 4

$1,888 AUD

$1,326 USD

View

Price last confirmed 11 days ago

Retailer 5

$2,135 AUD

$1,500 USD

View

B+

Retailer 6

$3,001 AUD

$2,108 USD

View

B+

Retailer 7

$3,197 AUD

$2,246 USD

View

Retailer 8

$3,539 AUD

$2,486 USD

View

Price last confirmed 10 days ago

B+

Retailer 9

$3,778 AUD

$2,654 USD

View

Retailer 10

$4,051 AUD

View

Price last confirmed 22 days ago

Retailer 11

$4,260 AUD

View

Price last confirmed 8 days ago

B+

Retailer 12

$4,384 AUD

ZAR 49,753 ZAR

View

Retailer 13

$5,207 AUD

£2,880 GBP

View

Retailer 14

$5,467 AUD

$3,840 USD

View

Retailer 15

$6,098 AUD

£3,373 GBP

View

Most Expensive

Queensmith

LG728501454 · Oct 16

$8,570 AUD

£4,740 GBP

View

Price last confirmed 14 days ago

15 more retailers have this diamond

Prices start from $1,822 AUDSave up to $4,276 AUD

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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3.91ct Radiant

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