Radiant|Lab Grown|IGI

1.57ct D IF Radiant Lab Grown Diamond

ID • D/IF • IGI LG665445078

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

Certificate IGI LG665445078

Diamond specifications and retailer prices

From £216 GBP

$289 USD

As of October 30, 2026

Save £2,173 GBP (91%) vs most expensive(unlock to see where)

26 retailers carry this diamond

Most expensive: £2,388 GBP at Diamond Quarter · As of October 31, 2026

View at Diamond Quarter

About this 1.57ct lab-grown radiant diamond

This 1.57ct 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 LG665445078 or 665445078. Listed at 26 retailers as of October 30, 2026, with prices from £216 to £2,388, a £2,173 spread on the same certified stone. Diamond Quarter lists it at £2,388. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.57

Carat

Colour

Clarity

Ideal

Cut

Specifications

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle44.1°

Pavilion angle33.3°

OriginLab Grown

Grading LabIGI

CertificateIGI LG665445078

Dimensions8.55 × 5.71 × 3.73 mm

L/W Ratio1.50

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 LG665445078

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: £480 GBP|Low: £207 GBP|High: £2,530 GBP|Avg: £862 GBP|-2.9%

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October 31, 2026

Retailer 3£216 GBP

Retailer 24£250 GBP

Retailer 5£257 GBP

Retailer 2£267 GBP

Retailer 7£381 GBP

Retailer 16£392 GBP

Retailer 8£416 GBP

Retailer 14£463 GBP

Retailer 1£480 GBP

Retailer 23£507 GBP

Retailer 12£526 GBP

Retailer 9£631 GBP

Retailer 15£665 GBP

Retailer 22£687 GBP

Retailer 6£821 GBP

Retailer 4£949 GBP

Retailer 11£1,028 GBP

Retailer 17£1,069 GBP

Retailer 10£1,099 GBP

Retailer 18£1,142 GBP

Retailer 21£1,189 GBP

Retailer 19£1,254 GBP

Retailer 13£1,911 GBP

Retailer 25£1,918 GBP

Retailer 20£2,194 GBP

34 data points across 25 retailers

26 retailers£216 GBP to £2,388 GBP

Cheapest Retailer

£216 GBP

$289 USD

Retailer 2

£250 GBP

$335 USD

View

Retailer 3

£257 GBP

$344 USD

View

Final sale: no returns

Retailer 4

£267 GBP

$358 USD

View

Retailer 5

£381 GBP

$510 USD

View

Retailer 6

£392 GBP

HK$4,100 HKD

View

Retailer 7

£416 GBP

$558 USD

View

Retailer 8

£463 GBP

$621 USD

View

Retailer 9

£480 GBP

€612 EUR

View

Retailer 10

£507 GBP

ZAR 10,972 ZAR

View

Retailer 11

£526 GBP

View

Retailer 12

£631 GBP

$845 USD

View

Retailer 13

£665 GBP

$891 USD

View

Retailer 14

£687 GBP

A$1,417 AUD

View

B+

Retailer 15

£821 GBP

$1,100 USD

View

B+

Retailer 16

£949 GBP

$1,271 USD

View

B+

Retailer 17

£1,028 GBP

$1,377 USD

View

B+

Retailer 18

£1,069 GBP

$1,433 USD

View

B+

Retailer 19

£1,099 GBP

$1,473 USD

View

B+

Retailer 20

£1,142 GBP

SGD 2,067 SGD

View

B+

Retailer 21

£1,189 GBP

View

B+

Retailer 22

£1,254 GBP

A$2,585 AUD

View

Retailer 23

£1,911 GBP

$2,560 USD

View

Retailer 24

£1,918 GBP

$2,570 USD

View

Retailer 25

£2,194 GBP

$2,940 USD

View

Most Expensive

Diamond Quarter

1.57IFDLG784962N · Oct 31

£2,388 GBP

View

25 more retailers have this diamond

Prices start from £216 GBPSave up to £2,173 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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