Radiant|Lab Grown|IGI

3.15ct D IF Radiant Lab Grown Diamond

ID • D/IF • IGI LG745508340

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

Certificate IGI LG745508340

Diamond specifications and retailer prices

From £726 GBP

$973 USD

As of October 30, 2026

Save £5,722 GBP (89%) vs most expensive(unlock to see where)

14 retailers carry this diamond

Most expensive: £6,448 GBP at Do Amore Diamonds · As of October 31, 2026

View at Do Amore Diamonds

About this 3.15ct lab-grown radiant diamond

This 3.15ct lab-grown radiant 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 LG745508340 or 745508340. Listed at 14 retailers as of October 30, 2026, with prices from £726 to £6,448, a £5,722 spread on the same certified stone. Do Amore Diamonds lists it at £6,448. 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

3.15

Carat

Colour

Clarity

Ideal

Cut

Specifications

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle42.5°

Pavilion angle35.3°

OriginLab Grown

Grading LabIGI

CertificateIGI LG745508340

Dimensions9.88 × 7.20 × 4.98 mm

L/W Ratio1.37

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 LG745508340

Side View

Caratlytics Score

How it works →

A+

Exceptional

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: £6,448 GBP|Low: £726 GBP|High: £7,419 GBP|Avg: £2,685 GBP|-13.1%

Do Amore Diamonds

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

October 31, 2026

Retailer 9£726 GBP

Retailer 12£808 GBP

Retailer 6£1,019 GBP

Retailer 8£1,058 GBP

Retailer 13£1,376 GBP

Retailer 2£1,377 GBP

Retailer 7£1,775 GBP

Retailer 11£1,781 GBP

Retailer 14£2,172 GBP

Retailer 4£2,516 GBP

Retailer 10£3,241 GBP

Retailer 3£4,075 GBP

Retailer 5£6,112 GBP

Do Amore Diamonds£6,448 GBP

32 data points across 14 retailers

14 retailers£726 GBP to £6,448 GBP

A+

Cheapest Retailer

£726 GBP

$973 USD

Retailer 2

£808 GBP

$1,082 USD

View

Retailer 3

£1,019 GBP

$1,365 USD

View

Final sale: no returns

Retailer 4

£1,058 GBP

$1,417 USD

View

Retailer 5

£1,376 GBP

$1,844 USD

View

Retailer 6

£1,377 GBP

$1,845 USD

View

Retailer 7

£1,775 GBP

$2,378 USD

View

Retailer 8

£1,781 GBP

$2,387 USD

View

Retailer 9

£2,172 GBP

A$4,478 AUD

View

Price last confirmed 9 days ago

Retailer 10

£2,516 GBP

$3,371 USD

View

B+

Retailer 11

£3,241 GBP

View

Retailer 12

£4,075 GBP

$5,460 USD

View

Price last confirmed 12 days ago

Retailer 13

£6,112 GBP

$8,190 USD

View

Most Expensive

Do Amore Diamonds

27-34F605E6C · Oct 31

£6,448 GBP

$8,640 USD

View

13 more retailers have this diamond

Prices start from £726 GBPSave up to £5,722 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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A+

3.15ct Radiant

£726 GBP