Round|Lab Grown|IGI

4.25ct E FL Round Lab Grown Diamond

ID • E/FL • IGI LG810620388

Shape and cutting style on the report: Round brilliant

Certificate IGI LG810620388

Diamond specifications and retailer prices

From £2,518 GBP

$3,374 USD

As of October 29, 2026

Save £8,490 GBP (77%) vs most expensive(unlock to see where)

21 retailers carry this diamond

Most expensive: £11,008 GBP at Brilliant Earth · As of October 31, 2026

View at Brilliant Earth

About this 4.25ct lab-grown round diamond

This 4.25ct lab-grown round sits in the three to five carat band, graded E colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG810620388 or 810620388. Listed at 21 retailers as of October 29, 2026, with prices from £2,518 to £11,008, a £8,490 spread on the same certified stone. Brilliant Earth lists it at £11,008. 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

4.25

Carat

Colour

Clarity

Ideal

Cut

Specifications

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle34.6°

Pavilion angle40.6°

OriginLab Grown

Grading LabIGI

CertificateIGI LG810620388

Dimensions10.39 × 10.45 × 6.34 mm

L/W Ratio1.01

Girdle conditionFaceted

Cert comments

HEARTS & ARROWS 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 LG810620388

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: £11,008 GBP|Low: £2,518 GBP|High: £14,113 GBP|Avg: £5,395 GBP|-22.0%

Brilliant Earth

Retailer 2

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Retailer 21

November 1, 2026

Retailer 14£2,518 GBP

Retailer 8£2,740 GBP

Retailer 10£2,820 GBP

Retailer 5£2,864 GBP

Retailer 4£2,921 GBP

Retailer 12£2,921 GBP

Retailer 20£2,922 GBP

Retailer 17£3,401 GBP

Retailer 7£3,618 GBP

Retailer 3£3,650 GBP

Retailer 15£3,674 GBP

Retailer 2£3,880 GBP

Retailer 21£4,193 GBP

Retailer 13£5,160 GBP

Retailer 16£6,217 GBP

Retailer 9£7,317 GBP

Retailer 18£7,444 GBP

Retailer 6£8,106 GBP

Retailer 19£9,841 GBP

Retailer 11£10,252 GBP

Brilliant Earth£11,008 GBP

33 data points across 21 retailers

21 retailers£2,518 GBP to £11,008 GBP

Cheapest Retailer

£2,518 GBP

$3,374 USD

Retailer 2

£2,740 GBP

$3,671 USD

View

Retailer 3

£2,820 GBP

$3,779 USD

View

Final sale: no returns

Retailer 4

£2,864 GBP

$3,838 USD

View

Retailer 5

£2,921 GBP

$3,914 USD

View

Price last confirmed 19 days ago

Retailer 6

£2,921 GBP

$3,914 USD

View

Retailer 7

£2,922 GBP

$3,915 USD

View

Retailer 8

£3,401 GBP

HK$35,600 HKD

View

Retailer 9

£3,618 GBP

$4,848 USD

View

Retailer 10

£3,650 GBP

$4,891 USD

View

Retailer 11

£3,674 GBP

$4,923 USD

View

Retailer 12

£3,880 GBP

View

Retailer 13

£4,193 GBP

$5,618 USD

View

B+

Retailer 14

£5,160 GBP

€6,584 EUR

View

B+

Retailer 15

£6,217 GBP

ZAR 134,572 ZAR

View

B+

Retailer 16

£7,317 GBP

$9,804 USD

View

Retailer 17

£7,444 GBP

View

B+

Retailer 18

£8,106 GBP

$10,861 USD

View

B+

Retailer 19

£9,841 GBP

SGD 17,818 SGD

View

Retailer 20

£10,252 GBP

$13,736 USD

View

Most Expensive

Brilliant Earth

20726621A · Oct 31

£11,008 GBP

$14,750 USD

View

20 more retailers have this diamond

Prices start from £2,518 GBPSave up to £8,490 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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