Round|Lab Grown|IGI

1.91ct D FL Round Lab Grown Diamond

ID • D/FL • IGI LG817693378

Shape and cutting style on the report: Round brilliant

Certificate IGI LG817693378

Diamond specifications and retailer prices

From £779 GBP

$1,037 USD

As of October 29, 2026

Save £3,674 GBP (83%) vs most expensive(unlock to see where)

21 retailers carry this diamond

Most expensive: £4,453 GBP at Brilliant Earth · As of October 30, 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 D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG817693378 or 817693378. Listed at 21 retailers as of October 29, 2026, with prices from £779 to £4,453, a £3,674 spread on the same certified stone. Brilliant Earth lists it at £4,453. 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 angle33°

Pavilion angle40.8°

OriginLab Grown

Grading LabIGI

CertificateIGI LG817693378

Dimensions8.05 × 8.11 × 4.87 mm

L/W Ratio1.01

Girdle conditionFaceted

Cert comments

HEARTS & ARROWS 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 LG817693378

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 29

Current: £4,453 GBP|Low: £747 GBP|High: £4,828 GBP|Avg: £1,858 GBP|-7.6%

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

Retailer 15

October 30, 2026

Retailer 14£779 GBP

Retailer 5£847 GBP

Retailer 7£872 GBP

Retailer 15£903 GBP

Retailer 13£1,033 GBP

Retailer 2£1,303 GBP

Retailer 3£1,441 GBP

Retailer 9£1,443 GBP

Retailer 8£1,660 GBP

Retailer 6£1,693 GBP

Retailer 12£2,636 GBP

Retailer 11£2,668 GBP

Retailer 4£3,031 GBP

Retailer 10£3,068 GBP

Brilliant Earth£4,453 GBP

39 data points across 15 retailers

21 retailers£779 GBP to £4,453 GBP

Cheapest Retailer

£779 GBP

$1,037 USD

Retailer 2

£847 GBP

$1,128 USD

View

Retailer 3

£872 GBP

$1,161 USD

View

Final sale: no returns

Retailer 4

£903 GBP

$1,203 USD

View

Price last confirmed 13 days ago

Retailer 5

£903 GBP

$1,203 USD

View

B+

Retailer 6

£1,033 GBP

$1,375 USD

View

B+

Retailer 7

£1,048 GBP

HK$10,900 HKD

View

B+

Retailer 8

£1,282 GBP

$1,707 USD

View

B+

Retailer 9

£1,303 GBP

View

B+

Retailer 10

£1,441 GBP

$1,919 USD

View

B+

Retailer 11

£1,443 GBP

€1,830 EUR

View

B+

Retailer 12

£1,660 GBP

ZAR 35,722 ZAR

View

B+

Retailer 13

£1,693 GBP

$2,255 USD

View

Retailer 14

£1,888 GBP

$2,514 USD

View

Retailer 15

£2,636 GBP

$3,510 USD

View

Retailer 16

£2,668 GBP

$3,553 USD

View

Retailer 17

£2,902 GBP

$3,865 USD

View

Retailer 18

£3,031 GBP

SGD 5,454 SGD

View

Retailer 19

£3,068 GBP

View

Retailer 20

£3,152 GBP

$4,198 USD

View

Most Expensive

Brilliant Earth

20860275A · Oct 30

£4,453 GBP

$5,930 USD

View

20 more retailers have this diamond

Prices start from £779 GBPSave up to £3,674 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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1.91ct Round

£779 GBP