Heart|Lab Grown|IGI

12.31ct G VS1 Heart Lab Grown Diamond

ID • G/VS1 • IGI LG720520483

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG720520483

Diamond specifications and retailer prices

From £3,201 GBP

$4,295 USD

As of November 3, 2026

Save £12,695 GBP (80%) vs most expensive(unlock to see where)

18 retailers carry this diamond

Most expensive: £15,896 GBP at With Clarity · As of November 3, 2026

View at With Clarity

About this 12.31ct lab-grown heart diamond

This 12.31ct lab-grown heart sits in the over five carat band, graded G colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG720520483 or 720520483. Listed at 18 retailers as of November 3, 2026, with prices from £3,201 to £15,896, a £12,695 spread on the same certified stone. With Clarity lists it at £15,896. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

12.31

Carat

Colour

VS1

Clarity

Ideal

Cut

Specifications

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle36°

Pavilion angle37.1°

OriginLab Grown

Grading LabIGI

CertificateIGI LG720520483

Dimensions14.26 × 15.98 × 8.97 mm

L/W Ratio1.12

Girdle conditionFaceted

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

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

CertificateIGI LG720520483

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: Nov 3

Current: £3,944 GBP|Low: £2,648 GBP|High: £15,896 GBP|Avg: £5,058 GBP|-3.1%

Retailer 1

Retailer 2

Retailer 3

Retailer 4

Retailer 5

Retailer 6

Retailer 7

Retailer 8

Retailer 9

Retailer 10

Retailer 11

Retailer 12

With Clarity

November 2, 2026

Retailer 10£2,759 GBP

Retailer 3£3,200 GBP

Retailer 8£3,201 GBP

Retailer 4£3,350 GBP

Retailer 7£3,431 GBP

Retailer 1£3,944 GBP

Retailer 5£4,184 GBP

Retailer 11£4,624 GBP

Retailer 9£4,952 GBP

Retailer 6£5,996 GBP

Retailer 2£7,692 GBP

Retailer 12£10,395 GBP

With Clarity£15,896 GBP

36 data points across 13 retailers

18 retailers£3,201 GBP to £15,896 GBP

Retailer 1

£3,001 GBP

$4,027 USD

Price last confirmed 35 days ago

Retailer 2

£3,200 GBP

$4,294 USD

View

Price last confirmed 31 days ago

Retailer 3

£3,201 GBP

$4,295 USD

View

Retailer 4

£3,350 GBP

$4,495 USD

View

Retailer 5

£3,431 GBP

$4,604 USD

View

Final sale: no returns

Retailer 6

£3,944 GBP

$5,293 USD

View

Retailer 7

£3,999 GBP

$5,366 USD

View

Price last confirmed 33 days ago

Retailer 8

£4,184 GBP

View

Retailer 9

£4,624 GBP

$6,205 USD

View

B+

Retailer 10

£4,952 GBP

ZAR 107,363 ZAR

View

B+

Retailer 11

£5,996 GBP

A$12,378 AUD

View

B+

Retailer 12

£6,978 GBP

$9,364 USD

View

Retailer 13

£7,692 GBP

$10,322 USD

View

Retailer 14

£8,055 GBP

$10,809 USD

View

Retailer 15

£8,883 GBP

$11,921 USD

View

Retailer 16

£10,395 GBP

$13,950 USD

View

Retailer 17

£11,299 GBP

$15,163 USD

View

Most Expensive

With Clarity

720520483 · Nov 3

£15,896 GBP

$21,331 USD

View

17 more retailers have this diamond

Prices start from £3,201 GBPSave up to £12,695 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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12.31ct Heart

£3,201 GBP