Heart|Lab Grown|IGI

6.66ct F VVS2 Heart Lab Grown Diamond

ID • F/VVS2 • IGI LG657463791

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG657463791

Diamond specifications and retailer prices

From £1,133 GBP

$1,520 USD

As of November 2, 2026

Save £4,359 GBP (79%) vs most expensive(unlock to see where)

17 retailers carry this diamond

Most expensive: £5,492 GBP at Brilliant Earth · As of November 2, 2026

View at Brilliant Earth

About this 6.66ct lab-grown heart diamond

This 6.66ct lab-grown heart sits in the over five carat band, graded F colour (colourless) and VVS2 clarity (very-very-slightly-included), with a top-tier cut grade and certified by IGI LG657463791 or 657463791. Listed at 17 retailers as of November 2, 2026, with prices from £1,133 to £5,492, a £4,359 spread on the same certified stone. Brilliant Earth lists it at £5,492. 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

6.66

Carat

Colour

VVS2

Clarity

Ideal

Cut

Specifications

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle35.5°

Pavilion angle40.7°

OriginLab Grown

Grading LabIGI

CertificateIGI LG657463791

Dimensions12.77 × 12.13 × 7.65 mm

L/W Ratio1.05

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 LG657463791

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 2

Current: £5,492 GBP|Low: £989 GBP|High: £10,373 GBP|Avg: £2,620 GBP|-47.0%

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

November 2, 2026

Retailer 5£1,018 GBP

Retailer 9£1,133 GBP

Retailer 6£1,444 GBP

Retailer 13£1,594 GBP

Retailer 2£1,724 GBP

Retailer 8£1,860 GBP

Retailer 10£1,943 GBP

Retailer 11£1,978 GBP

Retailer 12£2,402 GBP

Retailer 4£2,933 GBP

Retailer 7£3,225 GBP

Retailer 3£3,515 GBP

Brilliant Earth£5,492 GBP

41 data points across 13 retailers

17 retailers£1,133 GBP to £5,492 GBP

Retailer 1

£842 GBP

$1,130 USD

Price last confirmed 31 days ago

Retailer 2

£955 GBP

$1,281 USD

View

Price last confirmed 34 days ago

Retailer 3

£1,018 GBP

$1,366 USD

View

Price last confirmed 30 days ago

Retailer 4

£1,133 GBP

$1,520 USD

View

Retailer 5

£1,444 GBP

View

Retailer 6

£1,594 GBP

$2,139 USD

View

B+

Retailer 7

£1,724 GBP

€2,203 EUR

View

B+

Retailer 8

£1,860 GBP

A$3,840 AUD

View

Retailer 9

£1,908 GBP

$2,560 USD

View

Price last confirmed 33 days ago

B+

Retailer 10

£1,943 GBP

ZAR 42,114 ZAR

View

B+

Retailer 11

£1,978 GBP

$2,655 USD

View

B+

Retailer 12

£2,402 GBP

$3,224 USD

View

Retailer 13

£2,933 GBP

$3,936 USD

View

B+

Retailer 14

£3,225 GBP

View

Retailer 15

£3,515 GBP

$4,717 USD

View

Retailer 16

£4,124 GBP

A$8,514 AUD

View

Price last confirmed 121 days ago

Most Expensive

Brilliant Earth

21027063A · Nov 2

£5,492 GBP

$7,370 USD

View

16 more retailers have this diamond

Prices start from £1,133 GBPSave up to £4,359 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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6.66ct Heart

£1,133 GBP