Cushion|Lab Grown|IGI

6.78ct F VVS1 Cushion Lab Grown Diamond

ID • F/VVS1 • IGI LG806611727

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI LG806611727

Diamond specifications and retailer prices

From $3,305 AUD

$2,316 USD

As of November 1, 2026

Save $8,895 AUD (73%) vs most expensive(unlock to see where)

17 retailers carry this diamond

Most expensive: $21,601 AUD at Queensmith · As of October 9, 2026

View at Queensmith

About this 6.78ct lab-grown cushion diamond

This 6.78ct lab-grown cushion sits in the over five carat band, graded F colour (colourless) and VVS1 clarity (very-very-slightly-included), with a top-tier cut grade and certified by IGI LG806611727 or 806611727. Listed at 17 retailers as of November 1, 2026, with a 269% 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

6.78

Carat

Colour

VVS1

Clarity

Ideal

Cut

Specifications

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle35°

Pavilion angle39.1°

OriginLab Grown

Grading LabIGI

CertificateIGI LG806611727

Dimensions11.14 × 10.95 × 7.26 mm

L/W Ratio1.02

Girdle conditionFaceted

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 LG806611727

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: $21,601 AUD|Low: $3,305 AUD|High: $21,601 AUD|Avg: $9,538 AUD

Queensmith

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

November 3, 2026

Retailer 3$3,305 AUD

Retailer 2$4,708 AUD

Retailer 9$5,097 AUD

Retailer 11$5,355 AUD

Retailer 13$6,343 AUD

Retailer 5$6,524 AUD

Retailer 10$6,549 AUD

Retailer 6$8,567 AUD

Retailer 12$9,287 AUD

Retailer 4$9,309 AUD

Retailer 8$9,318 AUD

Retailer 14$10,272 AUD

Retailer 7$11,553 AUD

Retailer 16$12,084 AUD

Retailer 15$12,200 AUD

Queensmith$21,601 AUD

42 data points across 16 retailers

17 retailers$3,305 AUD to $12,200 AUD

Cheapest Retailer

$3,305 AUD

$2,316 USD

Final sale: no returns

Retailer 2

$4,708 AUD

£2,598 GBP

View

B+

Retailer 3

$5,097 AUD

$3,572 USD

View

B+

Retailer 4

$5,355 AUD

$3,753 USD

View

B+

Retailer 5

$6,343 AUD

View

B+

Retailer 6

$6,524 AUD

£3,600 GBP

View

B+

Retailer 7

$6,549 AUD

€4,371 EUR

View

Retailer 8

$8,567 AUD

$6,004 USD

View

Price last confirmed 7 days ago

B+

Retailer 9

$8,920 AUD

$6,251 USD

View

Retailer 10

$9,287 AUD

£5,125 GBP

View

B+

Retailer 11

$9,309 AUD

$6,524 USD

View

Retailer 12

$9,318 AUD

$6,530 USD

View

Price last confirmed 15 days ago

Retailer 13

$10,272 AUD

$7,199 USD

View

Retailer 14

$11,553 AUD

SGD 10,941 SGD

View

Retailer 15

$12,084 AUD

$8,469 USD

View

Retailer 16

$12,200 AUD

$8,550 USD

View

Most Expensive

Queensmith

LG806611727 · Oct 9

$21,601 AUD

£11,920 GBP

View

Price last confirmed 24 days ago

16 more retailers have this diamond

Prices start from $3,305 AUDSave up to $8,895 AUD

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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6.78ct Cushion

$3,305 AUD