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Cushion|Lab Grown|IGI

1.28ct D VS1 Cushion Lab Grown Diamond

ID • D/VS1 • IGI LG786634100

Shape and cutting style on the report: Antique cushion cut

Certificate IGI LG786634100

Diamond specifications and retailer prices

From $453 AUD
As of November 4, 2026
Save $1,798 AUD (80%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $2,987 AUD at Queensmith · As of October 27, 2026
View at Queensmith

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 LG786634100 or 786634100. Listed at 18 retailers as of November 3, 2026, with a 397% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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 angle34.5°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG786634100
Dimensions7.02 × 6.25 × 3.93 mm
L/W Ratio1.12
Girdle conditionFaceted
Culet sizeLarge
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
7.02 mm6.25 mm1.28 ctD / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG786634100
Side View
Table 52.0%Crown 34.5°Girdle: Slightly ThickPavilion 41.1°Culet: LargeDepth 62.9%

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: $1,381 AUD|Low: $435 AUD|High: $2,278 AUD|Avg: $1,135 AUD|+1.3%
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
November 4, 2026
Retailer 11$453 AUD
Retailer 5$507 AUD
Retailer 4$526 AUD
Retailer 2$562 AUD
Retailer 13$562 AUD
Retailer 12$756 AUD
Retailer 9$784 AUD
Retailer 7$992 AUD
Retailer 1$1,381 AUD
Retailer 10$1,648 AUD
Retailer 3$1,798 AUD
Retailer 14$1,806 AUD
Retailer 6$2,194 AUD
Retailer 8$2,251 AUD

44 data points across 14 retailers

18 retailers$453 AUD to $2,251 AUD

A
Cheapest Retailer
-
$453 AUD
A
Retailer 2
-
$507 AUD
View
Final sale: no returns
A
Retailer 3
-
$526 AUD
View
Retailer 4
-
$562 AUD
View
Price last confirmed 10 days ago
A
Retailer 5
-
$562 AUD
View
A
Retailer 6
-
$756 AUD
View
B+
Retailer 7
-
$784 AUD
View
B+
Retailer 8
-
$788 AUD
View
B+
Retailer 9
-
$992 AUD
View
B
Retailer 10
-
$1,381 AUD
View
B
Retailer 11
-
$1,648 AUD
View
B
Retailer 12
-
$1,798 AUD
View
B
Retailer 13
-
$1,806 AUD
View
B
Retailer 14
-
$1,870 AUD
View
B
Retailer 15
-
$2,194 AUD
View
B
Retailer 16
-
$2,237 AUD
View
B
Retailer 17
-
$2,251 AUD
View
Most Expensive
Queensmith
LG786634100 · Oct 27
$2,987 AUD
£1,650 GBP
View
Price last confirmed 8 days ago
17 more retailers have this diamond
Prices start from $453 AUDSave up to $1,798 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
$453 AUD