Marquise|Lab Grown|IGI

0.91ct E IF Marquise Lab Grown Diamond

ID • E/IF • IGI LG817670944

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG817670944

Diamond specifications and retailer prices

From £190 GBP

$253 USD

As of October 28, 2026

Save £959 GBP (83%) vs most expensive(unlock to see where)

16 retailers carry this diamond

Most expensive: £1,149 GBP at Brilliant Earth · As of October 28, 2026

View at Brilliant Earth

About this 0.91ct lab-grown marquise diamond

This 0.91ct lab-grown marquise sits in the just-under-one-carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG817670944 or 817670944. Listed at 16 retailers as of October 28, 2026, with prices from £190 to £1,149, a £959 spread on the same certified stone. Brilliant Earth lists it at £1,149. Flawless clarity in sub-one-carat stones is rarely visible to the naked eye over VS1, so you are paying a meaningful premium for grade rather than appearance.

The 4Cs

0.91

Carat

Colour

Clarity

Ideal

Cut

Specifications

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle37.1°

Pavilion angle40°

OriginLab Grown

Grading LabIGI

CertificateIGI LG817670944

Dimensions9.91 × 5.02 × 3.16 mm

L/W Ratio1.97

Girdle conditionFaceted

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 LG817670944

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 28

Current: £1,149 GBP|Low: £135 GBP|High: £1,149 GBP|Avg: £487 GBP

Brilliant Earth

Retailer 2

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October 29, 2026

Retailer 17£170 GBP

Retailer 8£190 GBP

Retailer 5£197 GBP

Retailer 6£211 GBP

Retailer 18£211 GBP

Retailer 4£297 GBP

Retailer 14£352 GBP

Retailer 12£382 GBP

Retailer 2£393 GBP

Retailer 3£430 GBP

Retailer 7£457 GBP

Retailer 13£526 GBP

Retailer 15£680 GBP

Retailer 10£718 GBP

Retailer 16£819 GBP

Retailer 11£850 GBP

Retailer 9£960 GBP

Brilliant Earth£1,149 GBP

35 data points across 18 retailers

16 retailers£190 GBP to £1,149 GBP

Cheapest Retailer

£190 GBP

$253 USD

Final sale: no returns

Retailer 2

£211 GBP

$281 USD

View

Price last confirmed 17 days ago

Retailer 3

£297 GBP

$395 USD

View

Retailer 4

£352 GBP

€447 EUR

View

Retailer 5

£382 GBP

ZAR 8,209 ZAR

View

Retailer 6

£393 GBP

View

Retailer 7

£430 GBP

$572 USD

View

Retailer 8

£457 GBP

$609 USD

View

Retailer 9

£526 GBP

A$1,078 AUD

View

Retailer 10

£678 GBP

$903 USD

View

Price last confirmed 29 days ago

B+

Retailer 11

£680 GBP

$906 USD

View

B+

Retailer 12

£718 GBP

$956 USD

View

B+

Retailer 13

£819 GBP

$1,090 USD

View

B+

Retailer 14

£850 GBP

View

Retailer 15

£960 GBP

$1,279 USD

View

Most Expensive

Brilliant Earth

21019102A · Oct 28

£1,149 GBP

$1,530 USD

View

15 more retailers have this diamond

Prices start from £190 GBPSave up to £959 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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