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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 €2,065 EUR
$2,316 USD
As of November 1, 2026
Save €5,558 EUR (73%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: €13,497 EUR 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
F
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
Top View
11.14 mm10.95 mm6.78 ctF / VVS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG806611727
Side View
Table 63.0%Crown 35°Girdle: MED-THKPavilion 39.1°Culet: NoneDepth 66.3%

Caratlytics Score

How it works →
A
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: €13,497 EUR|Low: €2,065 EUR|High: €13,497 EUR|Avg: €5,960 EUR
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€2,065 EUR
Retailer 2€2,942 EUR
Retailer 9€3,185 EUR
Retailer 11€3,346 EUR
Retailer 13€3,963 EUR
Retailer 5€4,076 EUR
Retailer 10€4,092 EUR
Retailer 6€5,353 EUR
Retailer 12€5,803 EUR
Retailer 4€5,817 EUR
Retailer 8€5,822 EUR
Retailer 14€6,418 EUR
Retailer 7€7,219 EUR
Retailer 16€7,550 EUR
Retailer 15€7,623 EUR
Queensmith€13,497 EUR

42 data points across 16 retailers

17 retailers€2,065 EUR to €7,623 EUR

A
Cheapest Retailer
-
€2,065 EUR
$2,316 USD
Final sale: no returns
A
Retailer 2
-
€2,942 EUR
£2,598 GBP
View
B+
Retailer 3
-
€3,185 EUR
$3,572 USD
View
B+
Retailer 4
-
€3,346 EUR
$3,753 USD
View
B+
Retailer 5
-
€3,963 EUR
A$6,839 AUD
View
B+
Retailer 6
-
€4,076 EUR
£3,600 GBP
View
B+
Retailer 7
-
€4,092 EUR
View
Retailer 8
-
€5,353 EUR
$6,004 USD
View
Price last confirmed 7 days ago
B+
Retailer 9
-
€5,573 EUR
$6,251 USD
View
B
Retailer 10
-
€5,803 EUR
£5,125 GBP
View
B+
Retailer 11
-
€5,817 EUR
$6,524 USD
View
Retailer 12
-
€5,822 EUR
$6,530 USD
View
Price last confirmed 15 days ago
B
Retailer 13
-
€6,418 EUR
$7,199 USD
View
B
Retailer 14
-
€7,219 EUR
SGD 10,941 SGD
View
B
Retailer 15
-
€7,550 EUR
$8,469 USD
View
B
Retailer 16
-
€7,623 EUR
$8,550 USD
View
Most Expensive
Queensmith
LG806611727 · Oct 9
€13,497 EUR
£11,920 GBP
View
Price last confirmed 24 days ago
16 more retailers have this diamond
Prices start from €2,065 EURSave up to €5,558 EUR

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.

A
6.78ct Cushion
€2,065 EUR