Oval|Lab Grown|IGI

4.00ct D IF Oval Lab Grown Diamond

ID • D/IF • IGI LG789621375

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG789621375

Diamond specifications and retailer prices

From £1,866 GBP

As of October 30, 2026

Save £12,785 GBP (87%) vs most expensive(unlock to see where)

28 retailers carry this diamond

Most expensive: £14,650 GBP at Brilliant Earth · As of October 24, 2026

View at Brilliant Earth

About this 4ct lab-grown oval diamond

This 4ct lab-grown oval sits in the three to five carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG789621375 or 789621375. Listed at 28 retailers as of October 24, 2026, with prices from £1,866 to £14,650, a £12,785 spread on the same certified stone. Brilliant Earth lists it at £14,650. 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

4.00

Carat

Colour

Clarity

Ideal

Cut

Specifications

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle31.7°

Pavilion angle39.9°

OriginLab Grown

Grading LabIGI

CertificateIGI LG789621375

Dimensions13.42 × 8.96 × 5.38 mm

L/W Ratio1.50

Girdle conditionFaceted

Culet sizePointed

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

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

CertificateIGI LG789621375

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 30

Current: £14,650 GBP|Low: £1,859 GBP|High: £14,650 GBP|Avg: £4,680 GBP

Brilliant Earth

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October 30, 2026

Retailer 2£1,866 GBP

Retailer 14£1,926 GBP

Retailer 5£1,953 GBP

Retailer 17£2,095 GBP

Retailer 23£2,123 GBP

Retailer 22£2,146 GBP

Retailer 15£2,233 GBP

Retailer 4£2,637 GBP

Retailer 3£2,883 GBP

Retailer 13£3,016 GBP

Retailer 12£3,070 GBP

Retailer 25£3,101 GBP

Retailer 9£3,479 GBP

Retailer 16£4,231 GBP

Retailer 11£4,359 GBP

Retailer 21£4,575 GBP

Retailer 19£4,754 GBP

Retailer 10£4,792 GBP

Retailer 7£5,402 GBP

Retailer 6£5,632 GBP

Retailer 20£6,011 GBP

Retailer 8£7,635 GBP

Retailer 18£7,790 GBP

Retailer 24£12,001 GBP

Brilliant Earth£14,650 GBP

27 data points across 25 retailers

28 retailers£1,866 GBP to £14,650 GBP

Cheapest Retailer

£1,866 GBP

Retailer 2

£1,926 GBP

$2,580 USD

View

Price last confirmed 7 days ago

Retailer 3

£1,953 GBP

$2,617 USD

View

Final sale: no returns

Retailer 4

£2,095 GBP

$2,807 USD

View

Price last confirmed 10 days ago

Retailer 5

£2,123 GBP

$2,845 USD

View

Retailer 6

£2,146 GBP

$2,875 USD

View

Retailer 7

£2,233 GBP

$2,992 USD

View

Price last confirmed 9 days ago

Retailer 8

£2,485 GBP

$3,329 USD

View

Price last confirmed 17 days ago

Retailer 9

£2,637 GBP

HK$27,600 HKD

View

Retailer 10

£2,883 GBP

$3,863 USD

View

Retailer 11

£3,016 GBP

View

Retailer 12

£3,070 GBP

$4,113 USD

View

Price last confirmed 8 days ago

Retailer 13

£3,101 GBP

$4,155 USD

View

Retailer 14

£3,479 GBP

$4,662 USD

View

Price last confirmed 7 days ago

B+

Retailer 15

£4,231 GBP

View

B+

Retailer 16

£4,575 GBP

$6,130 USD

View

B+

Retailer 17

£4,754 GBP

ZAR 102,899 ZAR

View

Retailer 18

£4,792 GBP

A$9,879 AUD

View

Price last confirmed 8 days ago

B+

Retailer 19

£5,402 GBP

$7,238 USD

View

B+

Retailer 20

£5,632 GBP

$7,546 USD

View

B+

Retailer 21

£5,804 GBP

$7,777 USD

View

B+

Retailer 22

£6,011 GBP

View

Retailer 23

£6,654 GBP

View

Price last confirmed 21 days ago

Retailer 24

£7,635 GBP

SGD 13,825 SGD

View

Retailer 25

£7,790 GBP

$10,437 USD

View

Retailer 26

£8,202 GBP

$10,990 USD

View

Retailer 27

£12,001 GBP

$16,080 USD

View

Most Expensive

Brilliant Earth

18674023A · Oct 24

£14,650 GBP

$19,630 USD

View

27 more retailers have this diamond

Prices start from £1,866 GBPSave up to £12,785 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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4.00ct Oval

£1,866 GBP