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Cushion|Lab Grown|IGI

6.40ct D VS1 Cushion Lab Grown Diamond

ID • D/VS1 • IGI LG706534146

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG706534146

Diamond specifications and retailer prices

From £1,776 GBP
$2,380 USD
As of October 29, 2026
Save £9,135 GBP (84%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £10,911 GBP at Do Amore Diamonds · As of October 29, 2026
View at Do Amore Diamonds

About this 6.4ct lab-grown cushion diamond

This 6.4ct lab-grown cushion sits in the over five carat band, graded D colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG706534146 or 706534146. Listed at 15 retailers as of October 29, 2026, with prices from £1,776 to £10,911, a £9,135 spread on the same certified stone. Do Amore Diamonds lists it at £10,911. 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

6.40
Carat
D
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.4°
Pavilion angle39.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG706534146
Dimensions9.80 × 9.80 × 6.41 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
9.80 mm9.80 mm6.40 ctD / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG706534146
Side View
Table 59.0%Crown 36.4°Girdle: MED-STKPavilion 39.2°Culet: NoneDepth 65.4%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29
Current: £2,145 GBP|Low: £1,776 GBP|High: £5,511 GBP|Avg: £3,131 GBP|-0.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 30, 2026
Retailer 7£1,776 GBP
Retailer 10£1,840 GBP
Retailer 2£1,961 GBP
Retailer 8£1,963 GBP
Retailer 1£2,145 GBP
Retailer 11£2,585 GBP
Retailer 4£2,797 GBP
Retailer 3£3,856 GBP
Retailer 5£3,931 GBP
Retailer 9£4,888 GBP
Retailer 6£5,467 GBP

43 data points across 11 retailers

15 retailers£1,776 GBP to £10,911 GBP

A
Cheapest Retailer
-
£1,776 GBP
$2,380 USD
Final sale: no returns
Retailer 2
-
£1,840 GBP
$2,466 USD
View
Price last confirmed 20 days ago
A
Retailer 3
-
£1,961 GBP
$2,628 USD
View
A
Retailer 4
-
£1,963 GBP
$2,630 USD
View
A
Retailer 5
-
£2,145 GBP
View
A
Retailer 6
-
£2,314 GBP
$3,100 USD
View
B+
Retailer 7
-
£2,585 GBP
$3,463 USD
View
B+
Retailer 8
-
£2,797 GBP
View
B+
Retailer 9
-
£3,856 GBP
View
B+
Retailer 10
-
£3,931 GBP
ZAR 85,083 ZAR
View
Retailer 11
-
£4,888 GBP
A$10,076 AUD
View
Price last confirmed 22 days ago
B
Retailer 12
-
£5,159 GBP
$6,913 USD
View
B
Retailer 13
-
£5,467 GBP
View
B
Retailer 14
-
£7,093 GBP
$9,504 USD
View
Most Expensive
B
Do Amore Diamonds
27-6BB238219 · Oct 29
£10,911 GBP
$14,620 USD
View
14 more retailers have this diamond
Prices start from £1,776 GBPSave up to £9,135 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
6.40ct Cushion
£1,776 GBP