Round|Lab Grown|IGI

4.28ct D IF Round Lab Grown Diamond

ID • D/IF • IGI LG754563427

Shape and cutting style on the report: Round brilliant

Certificate IGI LG754563427

Diamond specifications and retailer prices

From £1,947 GBP

$2,609 USD

As of October 29, 2026

Save £9,599 GBP (83%) vs most expensive(unlock to see where)

29 retailers carry this diamond

Most expensive: £11,546 GBP at Do Amore Diamonds · As of October 29, 2026

View at Do Amore Diamonds

About this 4.28ct lab-grown round diamond

This 4.28ct 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 LG754563427 or 754563427. Listed at 29 retailers as of October 29, 2026, with prices from £1,947 to £11,546, a £9,599 spread on the same certified stone. Do Amore Diamonds lists it at £11,546. 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

4.28

Carat

Colour

Clarity

Ideal

Cut

Specifications

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle34.3°

Pavilion angle40.7°

OriginLab Grown

Grading LabIGI

CertificateIGI LG754563427

Dimensions10.47 × 10.51 × 6.36 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 LG754563427

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: £11,546 GBP|Low: £1,671 GBP|High: £17,927 GBP|Avg: £5,174 GBP

Do Amore Diamonds

Retailer 2

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Retailer 22

October 30, 2026

Retailer 22£1,671 GBP

Retailer 9£2,062 GBP

Retailer 19£2,071 GBP

Retailer 4£2,172 GBP

Retailer 10£2,675 GBP

Retailer 21£2,844 GBP

Retailer 13£2,890 GBP

Retailer 3£2,984 GBP

Retailer 8£3,232 GBP

Retailer 15£3,305 GBP

Retailer 18£3,429 GBP

Retailer 16£4,575 GBP

Retailer 20£4,611 GBP

Retailer 7£5,198 GBP

Retailer 5£5,435 GBP

Retailer 11£5,622 GBP

Retailer 17£5,785 GBP

Retailer 14£7,499 GBP

Retailer 12£7,731 GBP

Retailer 6£8,421 GBP

Retailer 2£10,038 GBP

Do Amore Diamonds£11,546 GBP

36 data points across 22 retailers

29 retailers£1,947 GBP to £11,546 GBP

Retailer 1

£1,671 GBP

Price last confirmed 13 days ago

Retailer 2

£1,826 GBP

$2,447 USD

View

Price last confirmed 24 days ago

Retailer 3

£1,826 GBP

$2,447 USD

View

Price last confirmed 17 days ago

Retailer 4

£1,879 GBP

$2,517 USD

View

Price last confirmed 31 days ago

Retailer 5

£1,947 GBP

$2,609 USD

View

Retailer 6

£1,947 GBP

$2,609 USD

View

Price last confirmed 28 days ago

Retailer 7

£2,062 GBP

$2,763 USD

View

Retailer 8

£2,071 GBP

$2,775 USD

View

Retailer 9

£2,149 GBP

$2,879 USD

View

Price last confirmed 30 days ago

Retailer 10

£2,172 GBP

$2,910 USD

View

Final sale: no returns

Retailer 11

£2,267 GBP

$3,037 USD

View

Price last confirmed 37 days ago

Retailer 12

£2,675 GBP

HK$28,000 HKD

View

Retailer 13

£2,844 GBP

$3,810 USD

View

Retailer 14

£2,890 GBP

View

Retailer 15

£2,984 GBP

$3,998 USD

View

Retailer 16

£3,232 GBP

$4,330 USD

View

Retailer 17

£3,305 GBP

$4,429 USD

View

Price last confirmed 30 days ago

Retailer 18

£3,429 GBP

€4,376 EUR

View

Retailer 19

£4,575 GBP

ZAR 99,021 ZAR

View

Retailer 20

£4,611 GBP

A$9,506 AUD

View

Price last confirmed 8 days ago

B+

Retailer 21

£5,198 GBP

$6,965 USD

View

B+

Retailer 22

£5,435 GBP

$7,282 USD

View

B+

Retailer 23

£5,622 GBP

$7,533 USD

View

B+

Retailer 24

£5,785 GBP

View

B+

Retailer 25

£7,499 GBP

$10,048 USD

View

B+

Retailer 26

£7,731 GBP

SGD 13,998 SGD

View

Retailer 27

£8,421 GBP

A$17,358 AUD

View

Price last confirmed 21 days ago

B+

Retailer 28

£10,038 GBP

$13,450 USD

View

Most Expensive

Do Amore Diamonds

27-17C00EE80 · Oct 29

£11,546 GBP

$15,470 USD

View

28 more retailers have this diamond

Prices start from £1,947 GBPSave up to £9,599 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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4.28ct Round

£1,947 GBP