Radiant|Lab Grown|IGI

1.57ct D IF Radiant Lab Grown Diamond

ID • D/IF • IGI LG700512156

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

Certificate IGI LG700512156

Diamond specifications and retailer prices

From £248 GBP

$332 USD

As of October 30, 2026

Save £1,674 GBP (87%) vs most expensive(unlock to see where)

24 retailers carry this diamond

Most expensive: £1,922 GBP at Rare Carat · As of October 28, 2026

View at Rare Carat

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 LG700512156 or 700512156. Listed at 24 retailers as of October 28, 2026, with prices from £248 to £1,922, a £1,674 spread on the same certified stone. Rare Carat lists it at £1,922. 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 angle39.2°

Pavilion angle33°

OriginLab Grown

Grading LabIGI

CertificateIGI LG700512156

Dimensions8.59 × 5.74 × 3.70 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 LG700512156

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: £1,922 GBP|Low: £238 GBP|High: £1,929 GBP|Avg: £771 GBP|-0.4%

Rare Carat

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November 1, 2026

Retailer 3£248 GBP

Retailer 23£287 GBP

Retailer 22£296 GBP

Retailer 24£307 GBP

Retailer 14£353 GBP

Retailer 19£388 GBP

Retailer 7£433 GBP

Retailer 18£499 GBP

Retailer 11£501 GBP

Retailer 21£528 GBP

Retailer 13£550 GBP

Retailer 12£696 GBP

Retailer 20£717 GBP

Retailer 8£815 GBP

Retailer 5£902 GBP

Retailer 4£988 GBP

Retailer 15£1,021 GBP

Retailer 17£1,028 GBP

Retailer 16£1,028 GBP

Retailer 10£1,161 GBP

Retailer 9£1,205 GBP

Retailer 2£1,231 GBP

Retailer 6£1,275 GBP

Rare Carat£1,922 GBP

32 data points across 24 retailers

24 retailers£248 GBP to £1,922 GBP

A+

Cheapest Retailer

£248 GBP

$332 USD

Retailer 2

£287 GBP

$385 USD

View

Retailer 3

£296 GBP

$396 USD

View

Final sale: no returns

Retailer 4

£307 GBP

$412 USD

View

Retailer 5

£353 GBP

HK$3,700 HKD

View

Retailer 6

£388 GBP

$520 USD

View

Retailer 7

£433 GBP

$580 USD

View

Retailer 8

£499 GBP

€637 EUR

View

Retailer 9

£501 GBP

$671 USD

View

Retailer 10

£528 GBP

ZAR 11,431 ZAR

View

Retailer 11

£550 GBP

View

Retailer 12

£696 GBP

$933 USD

View

Retailer 13

£717 GBP

A$1,477 AUD

View

Retailer 14

£815 GBP

$1,092 USD

View

B+

Retailer 15

£902 GBP

$1,208 USD

View

B+

Retailer 16

£988 GBP

$1,324 USD

View

B+

Retailer 17

£1,021 GBP

$1,368 USD

View

B+

Retailer 18

£1,028 GBP

$1,377 USD

View

B+

Retailer 19

£1,028 GBP

SGD 1,862 SGD

View

B+

Retailer 20

£1,161 GBP

$1,556 USD

View

B+

Retailer 21

£1,205 GBP

$1,615 USD

View

B+

Retailer 22

£1,231 GBP

View

Retailer 23

£1,275 GBP

A$2,629 AUD

View

Price last confirmed 24 days ago

Most Expensive

Rare Carat

2186-12-614 · Oct 28

£1,922 GBP

$2,575 USD

View

23 more retailers have this diamond

Prices start from £248 GBPSave up to £1,674 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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