Round|Lab Grown|IGI

1.18ct H VVS1 Round Lab Grown Diamond

EX • H/VVS1 • IGI LG12377002

Shape and cutting style on the report: Round brilliant

Certificate IGI LG12377002

Diamond specifications and retailer prices

From £257 GBP

$344 USD

As of October 29, 2026

Save £1,121 GBP (81%) vs most expensive(unlock to see where)

20 retailers carry this diamond

Most expensive: £1,378 GBP at MOH London · As of October 29, 2026

View at MOH London

About this 1.18ct lab-grown round diamond

This 1.18ct lab-grown round sits in the classic one-carat band, graded H colour (near-colourless) and VVS1 clarity (very-very-slightly-included), with a top-tier cut grade and certified by IGI LG12377002 or 12377002. Listed at 20 retailers as of October 29, 2026, with prices from £257 to £1,378, a £1,121 spread on the same certified stone. MOH London lists it at £1,378. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.18

Carat

Colour

VVS1

Clarity

Excellent

Cut

Specifications

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle35°

Pavilion angle41.5°

OriginLab Grown

Grading LabIGI

CertificateIGI LG12377002

Dimensions6.77 × 6.80 × 4.21 mm

L/W Ratio1.00

Cert comments

As Grown - No indications of post-growth treatment. This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process.

View IGI Report →View Loupe360 Video →

Top View

OriginLab Grown

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceNone

CertificateIGI LG12377002

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: £1,378 GBP|Low: £256 GBP|High: £2,276 GBP|Avg: £738 GBP|+0.3%

MOH London

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

Retailer 16

Retailer 17

Retailer 18

Retailer 19

October 30, 2026

Retailer 3£257 GBP

Retailer 17£298 GBP

Retailer 4£300 GBP

Retailer 12£306 GBP

Retailer 6£318 GBP

Retailer 15£318 GBP

Retailer 8£433 GBP

Retailer 10£539 GBP

Retailer 18£555 GBP

Retailer 2£588 GBP

Retailer 14£603 GBP

Retailer 11£611 GBP

Retailer 13£855 GBP

Retailer 19£932 GBP

Retailer 9£937 GBP

Retailer 16£1,128 GBP

Retailer 5£1,244 GBP

MOH London£1,378 GBP

Retailer 7£2,276 GBP

13 data points across 19 retailers

20 retailers£257 GBP to £1,378 GBP

Cheapest Retailer

£257 GBP

$344 USD

Retailer 2

£298 GBP

$399 USD

View

Retailer 3

£300 GBP

$402 USD

View

Retailer 4

£306 GBP

$410 USD

View

Retailer 5

£318 GBP

$426 USD

View

Retailer 6

£318 GBP

$426 USD

View

B+

Retailer 7

£433 GBP

$580 USD

View

Retailer 8

£539 GBP

$722 USD

View

Retailer 9

£555 GBP

$743 USD

View

Retailer 10

£588 GBP

View

Retailer 11

£603 GBP

ZAR 13,053 ZAR

View

Retailer 12

£611 GBP

$819 USD

View

Retailer 13

£791 GBP

$1,060 USD

View

Retailer 14

£855 GBP

A$1,763 AUD

View

Retailer 15

£932 GBP

$1,249 USD

View

Retailer 16

£937 GBP

$1,256 USD

View

Retailer 17

£1,128 GBP

$1,512 USD

View

Retailer 18

£1,244 GBP

$1,667 USD

View

Most Expensive

MOH London

LG12377002 · Oct 29

£1,378 GBP

View

18 more retailers have this diamond

Prices start from £257 GBPSave up to £1,121 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

1.18ct Round

£257 GBP