Radiant|Lab Grown|IGI

1.55ct E SI1 Radiant Lab Grown Diamond

ID • E/SI1 • IGI LG614322823

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

Certificate IGI LG614322823

Diamond specifications and retailer prices

From £567 GBP

As of October 29, 2026

12 retailers carry this diamond

Most expensive: £931 GBP at Brilliant Earth · As of October 17, 2026

View at Brilliant Earth

About this 1.55ct lab-grown radiant diamond

This 1.55ct lab-grown radiant sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG614322823 or 614322823. Listed at 12 retailers as of October 29, 2026. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.55

Carat

Colour

SI1

Clarity

Ideal

Cut

Specifications

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle43.8°

Pavilion angle35.4°

OriginLab Grown

Grading LabIGI

CertificateIGI LG614322823

Dimensions8.05 × 5.74 × 3.90 mm

L/W Ratio1.40

Culet sizePointed

Cert comments

This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa

View IGI Report →View Loupe360 Video →

Top View

OriginLab Grown

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

CertificateIGI LG614322823

Side View

Caratlytics Score

How it works →

Good

Decent quality, room for better deals

Unlock full score analysis

See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29

Current: £931 GBP|Low: £130 GBP|High: £999 GBP|Avg: £397 GBP|-6.8%

Brilliant Earth

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 17, 2026

Retailer 12£130 GBP

Retailer 4£151 GBP

Retailer 7£161 GBP

Retailer 10£161 GBP

Retailer 8£209 GBP

Retailer 9£281 GBP

Retailer 3£288 GBP

Retailer 2£306 GBP

Retailer 6£349 GBP

Retailer 5£415 GBP

Retailer 14£496 GBP

Retailer 13£519 GBP

Retailer 11£764 GBP

Brilliant Earth£931 GBP

26 data points across 14 retailers

12 retailers

Retailer 1

£130 GBP

$173 USD

Price last confirmed 22 days ago

Retailer 2

£151 GBP

$201 USD

View

Price last confirmed 32 days ago

Retailer 3

£161 GBP

$215 USD

View

Price last confirmed 14 days ago

Retailer 4

£161 GBP

$215 USD

View

Price last confirmed 15 days ago

Retailer 5

£209 GBP

View

Price last confirmed 14 days ago

Retailer 6

£281 GBP

View

Price last confirmed 14 days ago

Retailer 7

£288 GBP

$384 USD

View

Price last confirmed 14 days ago

Retailer 8

£496 GBP

$660 USD

View

Price last confirmed 17 days ago

Retailer 9

£519 GBP

$691 USD

View

Price last confirmed 22 days ago

Retailer 10

£567 GBP

View

Retailer 11

£764 GBP

View

Price last confirmed 19 days ago

Most Expensive

Brilliant Earth

8851381A · Oct 17

£931 GBP

$1,240 USD

View

Price last confirmed 12 days ago

11 more retailers have this diamond

Prices start from £567 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.

Similar diamonds

1.55ct Radiant

£567 GBP