Radiant|Lab Grown|IGI

1.51ct D IF Radiant Lab Grown Diamond

EX • D/IF • IGI LG739503304

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

Certificate IGI LG739503304

Diamond specifications and retailer prices

From £206 GBP

$276 USD

As of October 30, 2026

Save £1,914 GBP (90%) vs most expensive(unlock to see where)

28 retailers carry this diamond

Most expensive: £2,120 GBP at Queensmith · As of October 27, 2026

View at Queensmith

About this 1.51ct lab-grown radiant diamond

This 1.51ct lab-grown radiant sits in the one-and-a-half to two carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG739503304 or 739503304. Listed at 28 retailers as of October 27, 2026, with prices from £206 to £2,120, a £1,914 spread on the same certified stone. Queensmith lists it at £2,120. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.51

Carat

Colour

Clarity

Excellent

Cut

Specifications

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle36.3°

Pavilion angle35.3°

OriginLab Grown

Grading LabIGI

CertificateIGI LG739503304

Dimensions8.40 × 5.84 × 3.77 mm

L/W Ratio1.44

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 LG739503304

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: £485 GBP|Low: £206 GBP|High: £2,429 GBP|Avg: £808 GBP|-7.8%

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November 2, 2026

Retailer 5£206 GBP

Retailer 14£230 GBP

Retailer 25£238 GBP

Retailer 8£255 GBP

Retailer 15£255 GBP

Retailer 19£297 GBP

Retailer 17£362 GBP

Retailer 21£372 GBP

Retailer 24£373 GBP

Retailer 7£449 GBP

Retailer 1£485 GBP

Retailer 20£500 GBP

Retailer 3£585 GBP

Retailer 23£656 GBP

Retailer 9£783 GBP

Retailer 6£904 GBP

Retailer 13£980 GBP

Retailer 18£1,026 GBP

Retailer 16£1,053 GBP

Retailer 11£1,067 GBP

Retailer 4£1,090 GBP

Retailer 12£1,127 GBP

Retailer 10£1,826 GBP

Retailer 2£1,829 GBP

Retailer 22£2,109 GBP

33 data points across 25 retailers

28 retailers£206 GBP to £2,120 GBP

Cheapest Retailer

£206 GBP

$276 USD

Retailer 2

£230 GBP

$308 USD

View

Final sale: no returns

Retailer 3

£238 GBP

$320 USD

View

Retailer 4

£255 GBP

$342 USD

View

Price last confirmed 8 days ago

Retailer 5

£255 GBP

$342 USD

View

Retailer 6

£297 GBP

View

Retailer 7

£362 GBP

HK$3,800 HKD

View

Retailer 8

£372 GBP

$499 USD

View

Retailer 9

£373 GBP

$500 USD

View

Retailer 10

£449 GBP

$603 USD

View

Retailer 11

£485 GBP

ZAR 10,516 ZAR

View

Retailer 12

£500 GBP

View

Retailer 13

£585 GBP

$785 USD

View

Retailer 14

£656 GBP

A$1,354 AUD

View

B+

Retailer 15

£783 GBP

$1,051 USD

View

B+

Retailer 16

£904 GBP

$1,213 USD

View

B+

Retailer 17

£954 GBP

$1,280 USD

View

B+

Retailer 18

£980 GBP

$1,315 USD

View

B+

Retailer 19

£1,026 GBP

$1,377 USD

View

B+

Retailer 20

£1,053 GBP

SGD 1,909 SGD

View

B+

Retailer 21

£1,067 GBP

$1,432 USD

View

B+

Retailer 22

£1,090 GBP

View

B+

Retailer 23

£1,127 GBP

View

Retailer 24

£1,826 GBP

$2,450 USD

View

Retailer 25

£1,829 GBP

$2,455 USD

View

Retailer 26

£1,845 GBP

$2,476 USD

View

Price last confirmed 105 days ago

Retailer 27

£2,109 GBP

$2,830 USD

View

Most Expensive

Queensmith

LG739503304 · Oct 27

£2,120 GBP

View

27 more retailers have this diamond

Prices start from £206 GBPSave up to £1,914 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.

Where to buy this spec

See every retailer carrying 1.51ct D IF radiant lab-grown

Ranked by inventory count, with return policy, certs, and trust signals.

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