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Cushion|Lab Grown|IGI

1.28ct D VS1 Cushion Lab Grown Diamond

ID • D/VS1 • IGI LG645412120

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG645412120

Diamond specifications and retailer prices

From $270 USD
As of November 4, 2026
Save $1,056 USD (80%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $1,326 USD 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 LG645412120 or 645412120. Listed at 16 retailers as of November 4, 2026, with prices from $270 to $1,326, a $1,056 spread on the same certified stone. Reve Diamonds lists it at $1,326. 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
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle39.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG645412120
Dimensions6.27 × 6.13 × 4.17 mm
L/W Ratio1.02
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.27 mm6.13 mm1.28 ctD / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG645412120
Side View
Table 63.0%Crown 36.5°Girdle: MED-STKPavilion 39.2°Culet: NoneDepth 68.0%

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: $397 USD|Low: $232 USD|High: $1,370 USD|Avg: $675 USD|+14.4%
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
Reve Diamonds
November 5, 2026
Retailer 13$270 USD
Retailer 5$286 USD
Retailer 1$397 USD
Retailer 2$439 USD
Retailer 15$492 USD
Retailer 14$504 USD
Retailer 9$525 USD
Retailer 10$561 USD
Retailer 6$604 USD
Retailer 4$696 USD
Retailer 3$725 USD
Retailer 7$794 USD
Retailer 12$1,014 USD
Retailer 11$1,196 USD
Retailer 8$1,230 USD
Reve Diamonds$1,326 USD

36 data points across 16 retailers

16 retailers$270 USD to $1,326 USD

A
Cheapest Retailer
-
$270 USD
Final sale: no returns
Retailer 2
-
$286 USD
View
Price last confirmed 11 days ago
A
Retailer 3
-
$397 USD
View
A
Retailer 4
-
$439 USD
View
A
Retailer 5
-
$492 USD
View
A
Retailer 6
-
$504 USD
View
A
Retailer 7
-
$525 USD
View
B+
Retailer 8
-
$561 USD
View
B+
Retailer 9
-
$604 USD
View
Retailer 10
-
$696 USD
View
Price last confirmed 9 days ago
Retailer 11
-
$725 USD
View
Price last confirmed 8 days ago
B+
Retailer 12
-
$794 USD
View
B
Retailer 13
-
$1,014 USD
View
B
Retailer 14
-
$1,196 USD
View
B
Retailer 15
-
$1,230 USD
View
Most Expensive
B
Reve Diamonds
06D541083 · Nov 4
$1,326 USD
View
15 more retailers have this diamond
Prices start from $270 USDSave up to $1,056 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
$270 USD