Asscher|Lab Grown|IGI

4.21ct D FL Asscher Lab Grown Diamond

EX • D/FL • IGI LG831604048

Shape and cutting style on the report: Square emerald cut

Certificate IGI LG831604048

Diamond specifications and retailer prices

From £3,825 GBP

As of October 30, 2026

Save £13,543 GBP (78%) vs most expensive(unlock to see where)

25 retailers carry this diamond

Most expensive: £17,368 GBP at With Clarity · As of October 30, 2026

View at With Clarity

About this 4.21ct lab-grown asscher diamond

This 4.21ct lab-grown asscher sits in the three to five carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG831604048 or 831604048. Listed at 25 retailers as of October 30, 2026, with prices from £3,825 to £17,368, a £13,543 spread on the same certified stone. With Clarity lists it at £17,368. 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

4.21

Carat

Colour

Clarity

Excellent

Cut

Specifications

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle35.3°

Pavilion angle41.6°

OriginLab Grown

Grading LabIGI

CertificateIGI LG831604048

Dimensions8.97 × 8.94 × 5.92 mm

L/W Ratio1.00

Cert comments

As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II

View IGI Report →View Loupe360 Video →

Top View

OriginLab Grown

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceNone

CertificateIGI LG831604048

Side View

Caratlytics Score

How it works →

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 30

Current: £10,598 GBP|Low: £3,789 GBP|High: £16,561 GBP|Avg: £7,487 GBP|-36.0%

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

Retailer 14

Retailer 15

October 30, 2026

Retailer 8£3,825 GBP

Retailer 6£3,947 GBP

Retailer 5£4,136 GBP

Retailer 7£4,579 GBP

Retailer 3£5,043 GBP

Retailer 13£5,483 GBP

Retailer 9£5,868 GBP

Retailer 4£6,695 GBP

Retailer 15£6,845 GBP

Retailer 11£7,523 GBP

Retailer 12£9,367 GBP

Retailer 10£9,745 GBP

Retailer 1£10,598 GBP

Retailer 2£10,999 GBP

Retailer 14£15,857 GBP

30 data points across 15 retailers

25 retailers£3,825 GBP to £17,368 GBP

Cheapest Retailer

£3,825 GBP

Retailer 2

£3,947 GBP

$5,289 USD

View

Retailer 3

£4,136 GBP

$5,542 USD

View

Retailer 4

£4,202 GBP

$5,630 USD

View

Retailer 5

£4,420 GBP

$5,922 USD

View

Final sale: no returns

Retailer 6

£4,579 GBP

$6,135 USD

View

Retailer 7

£4,579 GBP

$6,135 USD

View

Price last confirmed 14 days ago

Retailer 8

£4,590 GBP

$6,150 USD

View

Retailer 9

£4,847 GBP

$6,494 USD

View

Retailer 10

£5,043 GBP

$6,757 USD

View

Retailer 11

£5,436 GBP

$7,283 USD

View

Retailer 12

£5,483 GBP

HK$57,400 HKD

View

Retailer 13

£5,868 GBP

View

B+

Retailer 14

£6,495 GBP

View

Retailer 15

£6,695 GBP

$8,970 USD

View

Price last confirmed 11 days ago

B+

Retailer 16

£6,845 GBP

$9,172 USD

View

B+

Retailer 17

£7,523 GBP

€9,600 EUR

View

B+

Retailer 18

£9,367 GBP

View

B+

Retailer 19

£9,745 GBP

ZAR 210,936 ZAR

View

B+

Retailer 20

£10,598 GBP

$14,200 USD

View

Retailer 21

£10,999 GBP

$14,737 USD

View

Retailer 22

£12,732 GBP

$17,060 USD

View

Retailer 23

£15,857 GBP

SGD 28,712 SGD

View

Retailer 24

£16,315 GBP

$21,860 USD

View

Most Expensive

With Clarity

831604048 · Oct 30

£17,368 GBP

$23,271 USD

View

24 more retailers have this diamond

Prices start from £3,825 GBPSave up to £13,543 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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