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 $1,636 SGD

$1,280 USD

As of October 29, 2026

Save $3,840 SGD (70%) vs most expensive(unlock to see where)

16 retailers carry this diamond

Most expensive: $7,696 SGD 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: $3,937 SGD|Low: $1,624 SGD|High: $5,525 SGD|Avg: $3,371 SGD|-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$1,636 SGD

Retailer 4$1,695 SGD

Retailer 8$1,918 SGD

Retailer 7$2,695 SGD

Retailer 10$2,871 SGD

Retailer 3$3,178 SGD

Retailer 13$3,393 SGD

Retailer 5$3,638 SGD

Retailer 2$3,826 SGD

Retailer 1$3,937 SGD

Retailer 9$4,676 SGD

Retailer 11$4,909 SGD

Retailer 6$5,476 SGD

35 data points across 13 retailers

16 retailers$1,636 SGD to $5,476 SGD

Retailer 1

$1,461 SGD

$1,143 USD

Price last confirmed 8 days ago

Retailer 2

$1,590 SGD

$1,244 USD

View

Price last confirmed 9 days ago

Retailer 3

$1,636 SGD

$1,280 USD

View

Final sale: no returns

Retailer 4

$1,695 SGD

$1,326 USD

View

Price last confirmed 10 days ago

Retailer 5

$1,918 SGD

$1,500 USD

View

B+

Retailer 6

$2,695 SGD

$2,108 USD

View

B+

Retailer 7

$2,871 SGD

$2,246 USD

View

Retailer 8

$3,178 SGD

$2,486 USD

View

Price last confirmed 10 days ago

B+

Retailer 9

$3,393 SGD

$2,654 USD

View

Retailer 10

$3,638 SGD

A$4,378 AUD

View

Price last confirmed 21 days ago

Retailer 11

$3,826 SGD

A$4,604 AUD

View

Price last confirmed 8 days ago

B+

Retailer 12

$3,937 SGD

ZAR 49,753 ZAR

View

Retailer 13

$4,676 SGD

£2,880 GBP

View

Retailer 14

$4,909 SGD

$3,840 USD

View

Retailer 15

$5,476 SGD

£3,373 GBP

View

Most Expensive

Queensmith

LG728501454 · Oct 16

$7,696 SGD

£4,740 GBP

View

Price last confirmed 14 days ago

15 more retailers have this diamond

Prices start from $1,636 SGDSave up to $3,840 SGD

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

$1,636 SGD