Princess|Lab Grown|IGI

1.51ct E SI1 Princess Lab Grown Diamond

GD • E/SI1 • IGI LG737515680

Shape and cutting style on the report: Princess cut

Certificate IGI LG737515680

Diamond specifications and retailer prices

From £136 GBP

$181 USD

As of October 27, 2026

Save £675 GBP (83%) vs most expensive(unlock to see where)

19 retailers carry this diamond

Most expensive: £811 GBP at Brilliant Earth · As of October 29, 2026

View at Brilliant Earth

About this 1.51ct lab-grown princess diamond

This 1.51ct lab-grown princess sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a standard cut grade and certified by IGI LG737515680 or 737515680. Listed at 19 retailers as of October 27, 2026, with prices from £136 to £811, a £675 spread on the same certified stone. Brilliant Earth lists it at £811. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.51

Carat

Colour

SI1

Clarity

Good

Cut

Specifications

CutGood

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle39.3°

Pavilion angle38.6°

OriginLab Grown

Grading LabIGI

CertificateIGI LG737515680

Dimensions6.29 × 6.21 × 4.44 mm

L/W Ratio1.01

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

CutGood

PolishExcellent

SymmetryExcellent

FluorescenceNone

CertificateIGI LG737515680

Side View

Caratlytics Score

How it works →

Excellent

Excellent quality and great value

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

Price History

Last verified: Oct 27

Current: £811 GBP|Low: £87 GBP|High: £841 GBP|Avg: £408 GBP|-3.6%

Brilliant Earth

Retailer 2

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Retailer 13

October 29, 2026

Retailer 5£87 GBP

Retailer 11£136 GBP

Retailer 4£150 GBP

Retailer 6£290 GBP

Retailer 13£298 GBP

Retailer 2£302 GBP

Retailer 8£304 GBP

Retailer 10£418 GBP

Retailer 12£419 GBP

Retailer 3£550 GBP

Retailer 9£672 GBP

Retailer 7£791 GBP

Brilliant Earth£811 GBP

43 data points across 13 retailers

19 retailers£136 GBP to £811 GBP

Cheapest Retailer

£136 GBP

$181 USD

B+

Retailer 2

£150 GBP

$200 USD

View

Final sale: no returns

B+

Retailer 3

£158 GBP

$210 USD

View

B+

Retailer 4

£168 GBP

$224 USD

View

B+

Retailer 5

£168 GBP

$224 USD

View

B+

Retailer 6

£290 GBP

€368 EUR

View

Retailer 7

£298 GBP

$397 USD

View

B+

Retailer 8

£302 GBP

View

B+

Retailer 9

£304 GBP

View

B+

Retailer 10

£336 GBP

$447 USD

View

Retailer 11

£418 GBP

$556 USD

View

Retailer 12

£419 GBP

$558 USD

View

Retailer 13

£541 GBP

$720 USD

View

Retailer 14

£550 GBP

SGD 990 SGD

View

Retailer 15

£672 GBP

$895 USD

View

Retailer 16

£676 GBP

$900 USD

View

Price last confirmed 8 days ago

Retailer 17

£684 GBP

$911 USD

View

Price last confirmed 81 days ago

Retailer 18

£791 GBP

View

Most Expensive

Brilliant Earth

18694536A · Oct 29

£811 GBP

$1,080 USD

View

18 more retailers have this diamond

Prices start from £136 GBPSave up to £675 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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1.51ct Princess

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