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Cushion|Lab Grown|IGI

6.50ct D VS1 Cushion Lab Grown Diamond

D/VS1 • IGI LG776688550

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

Certificate IGI LG776688550

Diamond specifications and retailer prices

From £1,136 GBP
$1,522 USD
As of October 29, 2026
Save £4,977 GBP (81%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £6,112 GBP at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 6.5ct lab-grown cushion diamond

This 6.5ct lab-grown cushion sits in the over five carat band, graded D colour (colourless) and VS1 clarity (very-slightly-included) and certified by IGI LG776688550 or 776688550. Listed at 18 retailers as of October 29, 2026, with prices from £1,136 to £6,112, a £4,977 spread on the same certified stone. Brilliant Earth lists it at £6,112. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

6.50
Carat
D
Colour
VS1
Clarity
-
Cut

Specifications

Cut
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.1°
Pavilion angle36.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG776688550
Dimensions10.42 × 10.42 × 6.91 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.42 mm10.42 mm6.50 ctD / VS1
OriginLab Grown
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG776688550
Side View
Table 66.0%Crown 34.1°Girdle: STK-THKPavilion 36.9°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: Oct 29
Current: £6,112 GBP|Low: £1,136 GBP|High: £11,538 GBP|Avg: £2,818 GBP|-47.0%
Brilliant Earth
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
Retailer 18
October 31, 2026
Retailer 4£1,136 GBP
Retailer 10£1,215 GBP
Retailer 14£1,306 GBP
Retailer 3£1,446 GBP
Retailer 2£1,659 GBP
Retailer 15£1,681 GBP
Retailer 16£1,996 GBP
Retailer 11£2,122 GBP
Retailer 8£2,249 GBP
Retailer 12£2,276 GBP
Retailer 18£2,844 GBP
Retailer 17£2,910 GBP
Retailer 5£3,170 GBP
Retailer 6£3,481 GBP
Retailer 13£3,800 GBP
Retailer 7£4,135 GBP
Retailer 9£4,637 GBP
Brilliant Earth£6,112 GBP

40 data points across 18 retailers

18 retailers£1,136 GBP to £6,112 GBP

A
Cheapest Retailer
-
£1,136 GBP
$1,522 USD
Final sale: no returns
Retailer 2
-
£1,215 GBP
$1,628 USD
View
Price last confirmed 18 days ago
A
Retailer 3
-
£1,306 GBP
$1,750 USD
View
A
Retailer 4
-
£1,446 GBP
$1,938 USD
View
A
Retailer 5
-
£1,659 GBP
View
A
Retailer 6
-
£1,681 GBP
$2,252 USD
View
B+
Retailer 7
-
£1,996 GBP
$2,674 USD
View
B+
Retailer 8
-
£2,122 GBP
€2,708 EUR
View
Retailer 9
-
£2,249 GBP
A$4,637 AUD
View
Price last confirmed 9 days ago
B+
Retailer 10
-
£2,276 GBP
ZAR 49,276 ZAR
View
B+
Retailer 11
-
£2,844 GBP
View
B+
Retailer 12
-
£2,910 GBP
$3,899 USD
View
B
Retailer 13
-
£3,170 GBP
$4,248 USD
View
B
Retailer 14
-
£3,481 GBP
$4,664 USD
View
B
Retailer 15
-
£3,800 GBP
View
B
Retailer 16
-
£4,135 GBP
$5,540 USD
View
Retailer 17
-
£4,637 GBP
A$9,559 AUD
View
Price last confirmed 22 days ago
Most Expensive
B
Brilliant Earth
18209841A · Oct 30
£6,112 GBP
$8,190 USD
View
17 more retailers have this diamond
Prices start from £1,136 GBPSave up to £4,977 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.

A
6.50ct Cushion
£1,136 GBP