Heart|Lab Grown|IGI

3.54ct D FL Heart Lab Grown Diamond

EX • D/FL • IGI LG800611729

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG800611729

Diamond specifications and retailer prices

From £2,942 GBP

$3,942 USD

As of October 30, 2026

Save £9,723 GBP (77%) vs most expensive(unlock to see where)

22 retailers carry this diamond

Most expensive: £12,665 GBP at Brilliant Earth · As of October 30, 2026

View at Brilliant Earth

About this 3.54ct lab-grown heart diamond

This 3.54ct lab-grown heart 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 LG800611729 or 800611729. Listed at 22 retailers as of October 30, 2026, with prices from £2,942 to £12,665, a £9,723 spread on the same certified stone. Brilliant Earth lists it at £12,665. 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

3.54

Carat

Colour

Clarity

Excellent

Cut

Specifications

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle33.8°

Pavilion angle40.2°

OriginLab Grown

Grading LabIGI

CertificateIGI LG800611729

Dimensions10.83 × 9.53 × 6.14 mm

L/W Ratio1.14

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

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceNone

CertificateIGI LG800611729

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: £12,665 GBP|Low: £2,824 GBP|High: £13,891 GBP|Avg: £6,255 GBP

Brilliant Earth

Retailer 2

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October 31, 2026

Retailer 5£2,942 GBP

Retailer 2£3,048 GBP

Retailer 10£3,083 GBP

Retailer 11£3,231 GBP

Retailer 6£3,413 GBP

Retailer 8£3,413 GBP

Retailer 4£3,456 GBP

Retailer 9£3,461 GBP

Retailer 18£3,707 GBP

Retailer 3£3,994 GBP

Retailer 13£4,091 GBP

Retailer 7£4,265 GBP

Retailer 21£5,030 GBP

Retailer 20£7,350 GBP

Retailer 19£7,924 GBP

Retailer 17£7,942 GBP

Retailer 12£9,940 GBP

Retailer 16£10,730 GBP

Retailer 15£11,753 GBP

Retailer 14£12,099 GBP

Brilliant Earth£12,665 GBP

41 data points across 21 retailers

22 retailers£2,942 GBP to £12,665 GBP

Cheapest Retailer

£2,942 GBP

$3,942 USD

Retailer 2

£3,048 GBP

$4,084 USD

View

Final sale: no returns

Retailer 3

£3,083 GBP

$4,131 USD

View

B+

Retailer 4

£3,231 GBP

$4,329 USD

View

Retailer 5

£3,413 GBP

$4,573 USD

View

Price last confirmed 18 days ago

B+

Retailer 6

£3,413 GBP

$4,573 USD

View

B+

Retailer 7

£3,456 GBP

$4,630 USD

View

B+

Retailer 8

£3,461 GBP

$4,638 USD

View

B+

Retailer 9

£3,707 GBP

HK$38,800 HKD

View

B+

Retailer 10

£3,994 GBP

$5,352 USD

View

B+

Retailer 11

£4,091 GBP

View

B+

Retailer 12

£4,265 GBP

$5,714 USD

View

B+

Retailer 13

£5,030 GBP

$6,740 USD

View

B+

Retailer 14

£7,350 GBP

View

B+

Retailer 15

£7,583 GBP

$10,161 USD

View

B+

Retailer 16

£7,924 GBP

ZAR 171,513 ZAR

View

Retailer 17

£7,942 GBP

$10,641 USD

View

Retailer 18

£9,940 GBP

$13,319 USD

View

Retailer 19

£10,730 GBP

SGD 19,429 SGD

View

Retailer 20

£11,753 GBP

$15,748 USD

View

Retailer 21

£12,099 GBP

$16,211 USD

View

Most Expensive

Brilliant Earth

20146769A · Oct 30

£12,665 GBP

$16,970 USD

View

21 more retailers have this diamond

Prices start from £2,942 GBPSave up to £9,723 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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3.54ct Heart

£2,942 GBP