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 $4,116 NZD

$2,316 USD

As of November 1, 2026

Save $11,080 NZD (73%) vs most expensive(unlock to see where)

17 retailers carry this diamond

Most expensive: $26,905 NZD 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: $26,905 NZD|Low: $4,116 NZD|High: $26,905 NZD|Avg: $11,880 NZD

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$4,116 NZD

Retailer 2$5,864 NZD

Retailer 9$6,349 NZD

Retailer 11$6,670 NZD

Retailer 13$7,901 NZD

Retailer 5$8,126 NZD

Retailer 10$8,157 NZD

Retailer 6$10,670 NZD

Retailer 12$11,568 NZD

Retailer 4$11,595 NZD

Retailer 8$11,606 NZD

Retailer 14$12,795 NZD

Retailer 7$14,390 NZD

Retailer 16$15,051 NZD

Retailer 15$15,196 NZD

Queensmith$26,905 NZD

42 data points across 16 retailers

17 retailers$4,116 NZD to $15,196 NZD

Cheapest Retailer

$4,116 NZD

$2,316 USD

Final sale: no returns

Retailer 2

$5,864 NZD

£2,598 GBP

View

B+

Retailer 3

$6,349 NZD

$3,572 USD

View

B+

Retailer 4

$6,670 NZD

$3,753 USD

View

B+

Retailer 5

$7,901 NZD

A$6,839 AUD

View

B+

Retailer 6

$8,126 NZD

£3,600 GBP

View

B+

Retailer 7

$8,157 NZD

€4,371 EUR

View

Retailer 8

$10,670 NZD

$6,004 USD

View

Price last confirmed 7 days ago

B+

Retailer 9

$11,110 NZD

$6,251 USD

View

Retailer 10

$11,568 NZD

£5,125 GBP

View

B+

Retailer 11

$11,595 NZD

$6,524 USD

View

Retailer 12

$11,606 NZD

$6,530 USD

View

Price last confirmed 15 days ago

Retailer 13

$12,795 NZD

$7,199 USD

View

Retailer 14

$14,390 NZD

SGD 10,941 SGD

View

Retailer 15

$15,051 NZD

$8,469 USD

View

Retailer 16

$15,196 NZD

$8,550 USD

View

Most Expensive

Queensmith

LG806611727 · Oct 9

$26,905 NZD

£11,920 GBP

View

Price last confirmed 24 days ago

16 more retailers have this diamond

Prices start from $4,116 NZDSave up to $11,080 NZD

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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