Cushion|Lab Grown|IGI

6.51ct D VVS2 Cushion Lab Grown Diamond

ID • D/VVS2 • IGI LG791660765

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG791660765

Diamond specifications and retailer prices

From £1,639 GBP

$2,199 USD

As of November 1, 2026

Save £5,865 GBP (78%) vs most expensive(unlock to see where)

18 retailers carry this diamond

Most expensive: £10,174 GBP at Queensmith · As of October 9, 2026

View at Queensmith

About this 6.51ct lab-grown cushion diamond

This 6.51ct lab-grown cushion sits in the over five carat band, graded D colour (colourless) and VVS2 clarity (very-very-slightly-included), with a top-tier cut grade and certified by IGI LG791660765 or 791660765. Listed at 18 retailers as of November 1, 2026, with a 358% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

6.51

Carat

Colour

VVS2

Clarity

Ideal

Cut

Specifications

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle32.5°

Pavilion angle39°

OriginLab Grown

Grading LabIGI

CertificateIGI LG791660765

Dimensions11.78 × 9.97 × 6.87 mm

L/W Ratio1.18

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 LG791660765

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 1

Current: £2,635 GBP|Low: £1,639 GBP|High: £9,300 GBP|Avg: £3,498 GBP|-6.7%

Retailer 1

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

November 2, 2026

Retailer 3£1,639 GBP

Retailer 17£1,698 GBP

Retailer 10£1,757 GBP

Retailer 2£1,822 GBP

Retailer 6£1,902 GBP

Retailer 11£2,335 GBP

Retailer 15£2,426 GBP

Retailer 1£2,635 GBP

Retailer 13£3,145 GBP

Retailer 8£3,225 GBP

Retailer 14£3,285 GBP

Retailer 7£3,622 GBP

Retailer 5£4,574 GBP

Retailer 4£4,847 GBP

Retailer 12£4,847 GBP

Retailer 9£5,942 GBP

Retailer 16£7,504 GBP

34 data points across 17 retailers

18 retailers£1,639 GBP to £7,504 GBP

Cheapest Retailer

£1,639 GBP

$2,199 USD

Final sale: no returns

Retailer 2

£1,698 GBP

$2,278 USD

View

Price last confirmed 22 days ago

Retailer 3

£1,757 GBP

View

Retailer 4

£1,822 GBP

$2,445 USD

View

Retailer 5

£1,902 GBP

$2,552 USD

View

Retailer 6

£2,335 GBP

View

Retailer 7

£2,426 GBP

$3,255 USD

View

Retailer 8

£2,635 GBP

€3,368 EUR

View

B+

Retailer 9

£3,145 GBP

A$6,493 AUD

View

B+

Retailer 10

£3,225 GBP

View

B+

Retailer 11

£3,285 GBP

ZAR 71,207 ZAR

View

B+

Retailer 12

£3,622 GBP

$4,860 USD

View

B+

Retailer 13

£4,574 GBP

$6,138 USD

View

B+

Retailer 14

£4,847 GBP

$6,504 USD

View

B+

Retailer 15

£4,847 GBP

View

Retailer 16

£5,942 GBP

$7,973 USD

View

Retailer 17

£7,504 GBP

$10,070 USD

View

Most Expensive

Queensmith

LG791660765 · Oct 9

£10,174 GBP

View

Price last confirmed 24 days ago

17 more retailers have this diamond

Prices start from £1,639 GBPSave up to £5,865 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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6.51ct Cushion

£1,639 GBP