Round|Lab Grown|IGI

4.30ct D IF Round Lab Grown Diamond

ID • D/IF • IGI LG737578586

Shape and cutting style on the report: Round brilliant

Certificate IGI LG737578586

Diamond specifications and retailer prices

From £10,460 GBP

$13,930 USD

As of October 29, 2026

11 retailers carry this diamond

Most expensive: £10,460 GBP at Brilliant Earth

View at Brilliant Earth

About this 4.3ct lab-grown round diamond

This 4.3ct lab-grown round 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 LG737578586 or 737578586. Listed at 11 retailers as of October 29, 2026. 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

4.30

Carat

Colour

Clarity

Ideal

Cut

Specifications

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle35.9°

Pavilion angle40.6°

OriginLab Grown

Grading LabIGI

CertificateIGI LG737578586

Dimensions10.38 × 10.43 × 6.42 mm

L/W Ratio1.00

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 LG737578586

Side View

Caratlytics Score

How it works →

Good

Decent quality, room for better deals

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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29

Current: £10,460 GBP|Low: £1,426 GBP|High: £11,542 GBP|Avg: £4,620 GBP

Brilliant Earth

Retailer 2

Retailer 3

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Retailer 21

September 29, 2026

Retailer 11£1,919 GBP

Retailer 4£1,946 GBP

Retailer 19£2,020 GBP

Retailer 6£2,413 GBP

Retailer 14£2,682 GBP

Retailer 17£2,739 GBP

Retailer 3£2,884 GBP

Retailer 13£2,981 GBP

Retailer 16£3,128 GBP

Retailer 2£3,583 GBP

Retailer 12£3,762 GBP

Retailer 10£4,464 GBP

Retailer 7£5,097 GBP

Retailer 21£5,228 GBP

Retailer 9£5,238 GBP

Retailer 18£5,495 GBP

Retailer 5£6,999 GBP

Retailer 8£7,202 GBP

Retailer 15£9,208 GBP

Brilliant Earth£10,460 GBP

Retailer 20£10,768 GBP

14 data points across 21 retailers

11 retailers

Retailer 1

£1,565 GBP

$2,084 USD

Price last confirmed 34 days ago

Retailer 2

£1,790 GBP

$2,384 USD

View

Price last confirmed 32 days ago

Retailer 3

£1,825 GBP

$2,430 USD

View

Price last confirmed 36 days ago

Retailer 4

£1,919 GBP

$2,555 USD

View

Price last confirmed 44 days ago

Retailer 5

£2,682 GBP

HK$27,900 HKD

View

Price last confirmed 56 days ago

Retailer 6

£2,754 GBP

$3,668 USD

View

Price last confirmed 32 days ago

Retailer 7

£2,981 GBP

$3,970 USD

View

Price last confirmed 31 days ago

Retailer 8

£4,464 GBP

ZAR 96,031 ZAR

View

Price last confirmed 37 days ago

Retailer 9

£5,228 GBP

$6,963 USD

View

Price last confirmed 31 days ago

Retailer 10

£9,208 GBP

A$18,865 AUD

View

Price last confirmed 31 days ago

Most Expensive

Brilliant Earth

18669242Y · Oct 29

£10,460 GBP

$13,930 USD

View

10 more retailers have this diamond

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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4.30ct Round

£10,460 GBP