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Cushion|Lab Grown|IGI

1.28ct D VS1 Cushion Lab Grown Diamond

ID • D/VS1 • IGI LG783670511

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

Certificate IGI LG783670511

Diamond specifications and retailer prices

From $321 AUD
As of November 4, 2026
Save $1,388 AUD (81%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $1,709 AUD at Reve Diamonds · As of November 4, 2026
View at Reve Diamonds

About this 1.28ct lab-grown cushion diamond

This 1.28ct lab-grown cushion sits in the one-and-a-quarter to one-and-a-half carat band, graded D colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG783670511 or 783670511. Listed at 17 retailers as of November 4, 2026, with prices from $321 to $1,709, a $1,388 spread on the same certified stone. Reve Diamonds lists it at $1,709. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.28
Carat
D
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.2°
Pavilion angle39.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG783670511
Dimensions6.34 × 6.28 × 4.15 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
6.34 mm6.28 mm1.28 ctD / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG783670511
Side View
Table 62.0%Crown 35.2°Girdle: MED-THKPavilion 39.5°Culet: NoneDepth 66.1%

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: Nov 4
Current: $475 AUD|Low: $309 AUD|High: $1,953 AUD|Avg: $883 AUD|-0.9%
Retailer 1
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
Reve Diamonds
November 4, 2026
Retailer 10$321 AUD
Retailer 8$356 AUD
Retailer 1$475 AUD
Retailer 16$590 AUD
Retailer 14$614 AUD
Retailer 4$617 AUD
Retailer 9$647 AUD
Retailer 2$728 AUD
Retailer 3$815 AUD
Retailer 12$868 AUD
Retailer 11$951 AUD
Retailer 7$1,033 AUD
Retailer 6$1,110 AUD
Retailer 13$1,197 AUD
Retailer 5$1,220 AUD
Retailer 15$1,665 AUD
Reve Diamonds$1,709 AUD

21 data points across 17 retailers

17 retailers$321 AUD to $1,709 AUD

A
Cheapest Retailer
-
$321 AUD
Final sale: no returns
Retailer 2
-
$356 AUD
View
Price last confirmed 10 days ago
A
Retailer 3
-
$475 AUD
View
A
Retailer 4
-
$590 AUD
View
A
Retailer 5
-
$614 AUD
View
A
Retailer 6
-
$617 AUD
View
A
Retailer 7
-
$647 AUD
View
A
Retailer 8
-
$728 AUD
View
B+
Retailer 9
-
$815 AUD
View
B+
Retailer 10
-
$868 AUD
View
B+
Retailer 11
-
$951 AUD
View
Retailer 12
-
$1,033 AUD
View
Price last confirmed 7 days ago
B+
Retailer 13
-
$1,110 AUD
View
B+
Retailer 14
-
$1,197 AUD
View
B+
Retailer 15
-
$1,220 AUD
View
B
Retailer 16
-
$1,665 AUD
View
Most Expensive
B
Reve Diamonds
7BA50A69E · Nov 4
$1,709 AUD
$1,199 USD
View
16 more retailers have this diamond
Prices start from $321 AUDSave up to $1,388 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
1.28ct Cushion
$321 AUD