Cushion|Lab Grown|IGI

1.28ct D VVS1 Cushion Lab Grown Diamond

ID • D/VVS1 • IGI LG794641717

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

Certificate IGI LG794641717

Diamond specifications and retailer prices

From $249 USD
As of October 31, 2026
Save $1,018 USD (80%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $1,590 USD at Brilliant Earth · As of October 24, 2026
View at Brilliant Earth

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 VVS1 clarity (very-very-slightly-included), with a top-tier cut grade and certified by IGI LG794641717 or 794641717. Listed at 17 retailers as of October 30, 2026, with a 409% 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
Color
VVS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.6°
Pavilion angle39.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG794641717
Dimensions6.35 × 6.31 × 4.12 mm
L/W Ratio1.01
Girdle conditionFaceted
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
6.35 mm6.31 mm1.28 ctD / VVS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG794641717
Side View
Table 63.0%Crown 33.6°Girdle: MED-THKPavilion 39.4°Culet: NoneDepth 65.3%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 31
Current: $453 USD|Low: $246 USD|High: $1,267 USD|Avg: $644 USD|+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
October 31, 2026
Retailer 8$249 USD
Retailer 7$273 USD
Retailer 14$316 USD
Retailer 1$453 USD
Retailer 5$469 USD
Retailer 12$471 USD
Retailer 9$515 USD
Retailer 11$647 USD
Retailer 6$667 USD
Retailer 10$741 USD
Retailer 2$941 USD
Retailer 3$1,044 USD
Retailer 15$1,082 USD
Retailer 4$1,100 USD
Retailer 13$1,267 USD

26 data points across 15 retailers

17 retailers$249 USD to $1,267 USD

A
Cheapest Retailer
-
$249 USD
Final sale: no returns
A
Retailer 2
-
$273 USD
View
A
Retailer 3
-
$316 USD
£249 GBP
View
A
Retailer 4
-
$453 USD
€431 EUR
View
A
Retailer 5
-
$469 USD
ZAR 7,574 ZAR
View
A
Retailer 6
-
$471 USD
View
A
Retailer 7
-
$515 USD
£405 GBP
View
B+
Retailer 8
-
$647 USD
View
A
Retailer 9
-
$667 USD
A$1,026 AUD
View
B+
Retailer 10
-
$741 USD
View
B+
Retailer 11
-
$941 USD
View
B+
Retailer 12
-
$1,044 USD
A$1,606 AUD
View
B
Retailer 13
-
$1,082 USD
£852 GBP
View
B+
Retailer 14
-
$1,100 USD
£866 GBP
View
Retailer 15
-
$1,222 USD
View
Price last confirmed 110 days ago
B
Retailer 16
-
$1,267 USD
View
Most Expensive
Brilliant Earth
19355098A · Oct 24
$1,590 USD
View
Price last confirmed 7 days ago
16 more retailers have this diamond
Prices start from $249 USDSave up to $1,018 USD

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
$249 USD