Radiant|Lab Grown|IGI

2.78ct D IF Radiant Lab Grown Diamond

ID • D/IF • IGI LG717586153

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG717586153

Diamond specifications and retailer prices

From £1,023 GBP

$1,371 USD

As of October 30, 2026

Save £6,522 GBP (86%) vs most expensive(unlock to see where)

27 retailers carry this diamond

Most expensive: £7,784 GBP at Brilliant Earth · As of September 28, 2026

View at Brilliant Earth

About this 2.78ct lab-grown radiant diamond

This 2.78ct lab-grown radiant sits in the two to three carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG717586153 or 717586153. Listed at 27 retailers as of October 29, 2026, with a 637% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

2.78

Carat

Colour

Clarity

Ideal

Cut

Specifications

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle39.7°

Pavilion angle34.6°

OriginLab Grown

Grading LabIGI

CertificateIGI LG717586153

Dimensions9.77 × 6.99 × 4.71 mm

L/W Ratio1.40

Culet sizePointed

Cert comments

This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa

View IGI Report →View Loupe360 Video →

Top View

OriginLab Grown

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

CertificateIGI LG717586153

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: £7,545 GBP|Low: £1,023 GBP|High: £7,545 GBP|Avg: £2,620 GBP|+0.1%

Brilliant Earth

Retailer 2

Retailer 3

Retailer 4

Retailer 5

Retailer 6

Retailer 7

Retailer 8

Retailer 9

Retailer 10

Retailer 11

Retailer 12

Retailer 13

Retailer 14

Retailer 15

Retailer 16

Retailer 17

Retailer 18

Retailer 19

Retailer 20

October 30, 2026

Retailer 3£1,023 GBP

Retailer 9£1,187 GBP

Retailer 20£1,187 GBP

Retailer 4£1,242 GBP

Retailer 18£1,314 GBP

Retailer 2£1,674 GBP

Retailer 14£1,698 GBP

Retailer 15£1,850 GBP

Retailer 6£1,980 GBP

Retailer 5£2,224 GBP

Retailer 11£2,350 GBP

Retailer 16£2,822 GBP

Retailer 10£2,866 GBP

Retailer 13£3,062 GBP

Retailer 7£3,198 GBP

Retailer 19£3,421 GBP

Retailer 8£3,679 GBP

Retailer 17£3,833 GBP

Retailer 12£4,172 GBP

Brilliant Earth£7,545 GBP

33 data points across 20 retailers

27 retailers£1,023 GBP to £7,545 GBP

Cheapest Retailer

£1,023 GBP

$1,371 USD

Retailer 2

£1,187 GBP

$1,590 USD

View

Retailer 3

£1,187 GBP

$1,590 USD

View

Price last confirmed 18 days ago

Retailer 4

£1,242 GBP

$1,664 USD

View

Final sale: no returns

Retailer 5

£1,253 GBP

$1,679 USD

View

Price last confirmed 33 days ago

Retailer 6

£1,314 GBP

$1,760 USD

View

Retailer 7

£1,318 GBP

$1,766 USD

View

Price last confirmed 32 days ago

Retailer 8

£1,674 GBP

View

Retailer 9

£1,698 GBP

$2,275 USD

View

Retailer 10

£1,850 GBP

€2,361 EUR

View

Price last confirmed 7 days ago

Retailer 11

£1,980 GBP

$2,653 USD

View

Retailer 12

£2,224 GBP

$2,980 USD

View

Retailer 13

£2,350 GBP

$3,149 USD

View

Retailer 14

£2,426 GBP

$3,250 USD

View

Price last confirmed 31 days ago

Retailer 15

£2,822 GBP

A$5,817 AUD

View

Price last confirmed 8 days ago

B+

Retailer 16

£2,866 GBP

View

B+

Retailer 17

£3,062 GBP

ZAR 66,272 ZAR

View

B+

Retailer 18

£3,198 GBP

$4,285 USD

View

B+

Retailer 19

£3,200 GBP

$4,288 USD

View

Retailer 20

£3,421 GBP

A$7,051 AUD

View

Price last confirmed 22 days ago

B+

Retailer 21

£3,679 GBP

$4,929 USD

View

B+

Retailer 22

£3,833 GBP

View

B+

Retailer 23

£4,172 GBP

$5,590 USD

View

Retailer 24

£4,355 GBP

$5,835 USD

View

Price last confirmed 32 days ago

Retailer 25

£4,484 GBP

$6,009 USD

View

Price last confirmed 51 days ago

Retailer 26

£7,545 GBP

$10,110 USD

View

Most Expensive

Brilliant Earth

21576897A · Sep 28

£7,784 GBP

$10,430 USD

View

Price last confirmed 32 days ago

26 more retailers have this diamond

Prices start from £1,023 GBPSave up to £6,522 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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