Round|Lab Grown|IGI

1.91ct E IF Round Lab Grown Diamond

ID • E/IF • IGI LG607370993

Shape and cutting style on the report: Round brilliant

Certificate IGI LG607370993

Diamond specifications and retailer prices

From £345 GBP

$460 USD

As of October 29, 2026

Save £3,244 GBP (90%) vs most expensive(unlock to see where)

25 retailers carry this diamond

Most expensive: £3,589 GBP at Brilliant Earth · As of October 29, 2026

View at Brilliant Earth

About this 1.91ct lab-grown round diamond

This 1.91ct lab-grown round sits in the one-and-a-half to two carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG607370993 or 607370993. Listed at 25 retailers as of October 29, 2026, with prices from £345 to £3,589, a £3,244 spread on the same certified stone. Brilliant Earth lists it at £3,589. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.91

Carat

Colour

Clarity

Ideal

Cut

Specifications

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle35.3°

Pavilion angle40.9°

OriginLab Grown

Grading LabIGI

CertificateIGI LG607370993

Dimensions7.95 × 7.90 × 4.90 mm

L/W Ratio1.01

Girdle conditionFaceted

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 LG607370993

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 29

Current: £3,589 GBP|Low: £345 GBP|High: £3,965 GBP|Avg: £1,298 GBP|-9.5%

Brilliant Earth

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October 29, 2026

Retailer 4£345 GBP

Retailer 13£387 GBP

Retailer 14£387 GBP

Retailer 21£429 GBP

Retailer 7£471 GBP

Retailer 20£537 GBP

Retailer 23£574 GBP

Retailer 3£618 GBP

Retailer 17£656 GBP

Retailer 2£706 GBP

Retailer 19£737 GBP

Retailer 18£907 GBP

Retailer 5£998 GBP

Retailer 6£1,036 GBP

Retailer 9£1,363 GBP

Retailer 12£1,379 GBP

Retailer 11£1,402 GBP

Retailer 15£1,466 GBP

Retailer 8£1,520 GBP

Retailer 16£1,557 GBP

Retailer 22£1,577 GBP

Retailer 10£1,605 GBP

Brilliant Earth£3,589 GBP

30 data points across 23 retailers

25 retailers£345 GBP to £3,589 GBP

Cheapest Retailer

£345 GBP

$460 USD

Retailer 2

£387 GBP

$515 USD

View

Final sale: no returns

Retailer 3

£387 GBP

$516 USD

View

Retailer 4

£429 GBP

$571 USD

View

Retailer 5

£471 GBP

HK$4,900 HKD

View

Retailer 6

£537 GBP

$715 USD

View

Retailer 7

£574 GBP

$765 USD

View

Retailer 8

£589 GBP

$785 USD

View

Price last confirmed 13 days ago

Retailer 9

£618 GBP

$823 USD

View

Retailer 10

£656 GBP

€832 EUR

View

Retailer 11

£706 GBP

View

Retailer 12

£737 GBP

ZAR 15,852 ZAR

View

Retailer 13

£907 GBP

A$1,858 AUD

View

Retailer 14

£998 GBP

$1,329 USD

View

B+

Retailer 15

£1,036 GBP

$1,380 USD

View

B+

Retailer 16

£1,363 GBP

SGD 2,452 SGD

View

B+

Retailer 17

£1,379 GBP

$1,836 USD

View

B+

Retailer 18

£1,402 GBP

$1,866 USD

View

B+

Retailer 19

£1,466 GBP

A$3,004 AUD

View

Price last confirmed 8 days ago

B+

Retailer 20

£1,505 GBP

$2,004 USD

View

B+

Retailer 21

£1,520 GBP

$2,025 USD

View

B+

Retailer 22

£1,557 GBP

A$3,190 AUD

View

Price last confirmed 21 days ago

B+

Retailer 23

£1,577 GBP

View

B+

Retailer 24

£1,605 GBP

$2,137 USD

View

Most Expensive

Brilliant Earth

14484113A · Oct 29

£3,589 GBP

$4,780 USD

View

24 more retailers have this diamond

Prices start from £345 GBPSave up to £3,244 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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1.91ct Round

£345 GBP