Radiant|Lab Grown|IGI

3.18ct D IF Radiant Lab Grown Diamond

ID • D/IF • IGI LG719530985

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

Certificate IGI LG719530985

Diamond specifications and retailer prices

From £922 GBP

$1,228 USD

As of October 30, 2026

Save £2,957 GBP (76%) vs most expensive(unlock to see where)

23 retailers carry this diamond

Most expensive: £9,206 GBP at Brilliant Earth · As of October 18, 2026

View at Brilliant Earth

About this 3.18ct lab-grown radiant diamond

This 3.18ct 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 LG719530985 or 719530985. Listed at 23 retailers as of October 30, 2026, with a 321% 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

3.18

Carat

Colour

Clarity

Ideal

Cut

Specifications

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle40.2°

Pavilion angle32.4°

OriginLab Grown

Grading LabIGI

CertificateIGI LG719530985

Dimensions10.92 × 7.29 × 4.61 mm

L/W Ratio1.50

Girdle conditionFaceted

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 LG719530985

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: £9,206 GBP|Low: £922 GBP|High: £9,206 GBP|Avg: £2,612 GBP

Brilliant Earth

Retailer 2

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October 30, 2026

Retailer 12£922 GBP

Retailer 11£1,003 GBP

Retailer 6£1,069 GBP

Retailer 17£1,198 GBP

Retailer 9£1,259 GBP

Retailer 21£1,340 GBP

Retailer 16£1,530 GBP

Retailer 2£1,549 GBP

Retailer 19£1,700 GBP

Retailer 3£2,005 GBP

Retailer 10£2,049 GBP

Retailer 4£2,382 GBP

Retailer 22£2,420 GBP

Retailer 13£2,484 GBP

Retailer 8£2,586 GBP

Retailer 20£2,963 GBP

Retailer 18£3,441 GBP

Retailer 7£3,750 GBP

Retailer 5£3,879 GBP

Retailer 15£4,423 GBP

Retailer 14£5,321 GBP

Brilliant Earth£9,206 GBP

31 data points across 22 retailers

23 retailers£922 GBP to £3,879 GBP

A+

Cheapest Retailer

£922 GBP

$1,228 USD

Retailer 2

£1,003 GBP

$1,336 USD

View

Retailer 3

£1,069 GBP

$1,424 USD

View

Retailer 4

£1,198 GBP

$1,595 USD

View

Retailer 5

£1,259 GBP

$1,676 USD

View

Retailer 6

£1,279 GBP

$1,703 USD

View

Price last confirmed 17 days ago

Retailer 7

£1,340 GBP

$1,784 USD

View

Final sale: no returns

Retailer 8

£1,530 GBP

$2,038 USD

View

Retailer 9

£1,549 GBP

View

Retailer 10

£1,700 GBP

€2,156 EUR

View

Price last confirmed 7 days ago

Retailer 11

£2,005 GBP

$2,670 USD

View

Retailer 12

£2,049 GBP

$2,729 USD

View

Retailer 13

£2,382 GBP

$3,172 USD

View

Retailer 14

£2,420 GBP

A$4,957 AUD

View

Price last confirmed 8 days ago

Retailer 15

£2,484 GBP

ZAR 53,432 ZAR

View

Retailer 16

£2,586 GBP

View

B+

Retailer 17

£2,963 GBP

$3,946 USD

View

B+

Retailer 18

£3,441 GBP

View

B+

Retailer 19

£3,750 GBP

$4,994 USD

View

B+

Retailer 20

£3,879 GBP

$5,166 USD

View

Retailer 21

£4,423 GBP

$5,890 USD

View

Price last confirmed 25 days ago

Retailer 22

£5,321 GBP

A$10,901 AUD

View

Price last confirmed 21 days ago

Most Expensive

Brilliant Earth

20114891A · Oct 18

£9,206 GBP

$12,260 USD

View

Price last confirmed 11 days ago

22 more retailers have this diamond

Prices start from £922 GBPSave up to £2,957 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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