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 $3,236 CAD

$2,316 USD

As of November 1, 2026

Save $8,711 CAD (73%) vs most expensive(unlock to see where)

17 retailers carry this diamond

Most expensive: $21,154 CAD 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

Color

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: $21,154 CAD|Low: $3,236 CAD|High: $21,154 CAD|Avg: $9,362 CAD

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 2, 2026

Retailer 3$3,236 CAD

Retailer 11$4,656 CAD

Retailer 2$4,992 CAD

Retailer 10$5,244 CAD

Retailer 13$6,212 CAD

Retailer 5$6,389 CAD

Retailer 9$6,413 CAD

Retailer 6$8,390 CAD

Retailer 12$9,095 CAD

Retailer 4$9,117 CAD

Retailer 8$9,125 CAD

Retailer 14$10,060 CAD

Retailer 7$11,314 CAD

Retailer 16$11,834 CAD

Retailer 15$11,948 CAD

Queensmith$21,154 CAD

41 data points across 16 retailers

17 retailers$3,236 CAD to $11,948 CAD

Cheapest Retailer

$3,236 CAD

$2,316 USD

Final sale: no returns

B+

Retailer 2

$4,656 CAD

£2,624 GBP

View

B+

Retailer 3

$4,992 CAD

$3,572 USD

View

B+

Retailer 4

$5,244 CAD

$3,753 USD

View

B+

Retailer 5

$6,212 CAD

A$6,839 AUD

View

B+

Retailer 6

$6,389 CAD

£3,600 GBP

View

B+

Retailer 7

$6,413 CAD

€4,371 EUR

View

Retailer 8

$8,390 CAD

$6,004 USD

View

B+

Retailer 9

$8,735 CAD

$6,251 USD

View

Retailer 10

$9,095 CAD

£5,125 GBP

View

B+

Retailer 11

$9,117 CAD

$6,524 USD

View

Retailer 12

$9,125 CAD

$6,530 USD

View

Price last confirmed 14 days ago

Retailer 13

$10,060 CAD

$7,199 USD

View

Retailer 14

$11,314 CAD

SGD 10,941 SGD

View

Retailer 15

$11,834 CAD

$8,469 USD

View

Retailer 16

$11,948 CAD

$8,550 USD

View

Most Expensive

Queensmith

LG806611727 · Oct 9

$21,154 CAD

£11,920 GBP

View

Price last confirmed 24 days ago

16 more retailers have this diamond

Prices start from $3,236 CADSave up to $8,711 CAD

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

$3,236 CAD