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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 $3,388 AUD
$2,380 USD
As of October 29, 2026
Save $17,425 AUD (84%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $20,813 AUD at Do Amore Diamonds · As of October 31, 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 $3,388 to $20,813, a $17,425 spread on the same certified stone. Do Amore Diamonds lists it at $20,813. 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: $5,336 AUD|Low: $3,388 AUD|High: $10,512 AUD|Avg: $5,965 AUD|+0.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 31, 2026
Retailer 7$3,388 AUD
Retailer 10$3,511 AUD
Retailer 2$3,741 AUD
Retailer 8$3,744 AUD
Retailer 4$4,092 AUD
Retailer 11$4,930 AUD
Retailer 1$5,336 AUD
Retailer 3$7,355 AUD
Retailer 5$7,498 AUD
Retailer 9$9,324 AUD
Retailer 6$10,428 AUD

44 data points across 11 retailers

15 retailers$3,388 AUD to $20,813 AUD

A
Cheapest Retailer
-
$3,388 AUD
$2,380 USD
Final sale: no returns
Retailer 2
-
$3,511 AUD
$2,466 USD
View
Price last confirmed 20 days ago
A
Retailer 3
-
$3,741 AUD
$2,628 USD
View
A
Retailer 4
-
$3,744 AUD
$2,630 USD
View
A
Retailer 5
-
$4,092 AUD
£2,263 GBP
View
A
Retailer 6
-
$4,413 AUD
$3,100 USD
View
B+
Retailer 7
-
$4,930 AUD
$3,463 USD
View
B+
Retailer 8
-
$5,336 AUD
£2,951 GBP
View
B+
Retailer 9
-
$7,355 AUD
£4,068 GBP
View
B+
Retailer 10
-
$7,498 AUD
ZAR 85,083 ZAR
View
Retailer 11
-
$9,324 AUD
View
Price last confirmed 22 days ago
B
Retailer 12
-
$9,841 AUD
$6,913 USD
View
B
Retailer 13
-
$10,428 AUD
£5,768 GBP
View
B
Retailer 14
-
$13,530 AUD
$9,504 USD
View
Most Expensive
B
Do Amore Diamonds
27-6BB238219 · Oct 31
$20,813 AUD
$14,620 USD
View
14 more retailers have this diamond
Prices start from $3,388 AUDSave up to $17,425 AUD

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
$3,388 AUD