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Cushion|Lab Grown|IGI

1.28ct D VVS1 Cushion Lab Grown Diamond

ID • D/VVS1 • IGI LG786634346

Shape and cutting style on the report: Antique cushion cut

Certificate IGI LG786634346

Diamond specifications and retailer prices

From $414 USD
As of November 1, 2026
Save $1,770 USD (81%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $2,184 USD 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 VVS1 clarity (very-very-slightly-included), with a top-tier cut grade and certified by IGI LG786634346 or 786634346. Listed at 18 retailers as of October 27, 2026, with prices from $414 to $2,184, a $1,770 spread on the same certified stone. Queensmith lists it at $2,184. 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 angle34.5°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG786634346
Dimensions7.01 × 6.41 × 3.88 mm
L/W Ratio1.09
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
7.01 mm6.41 mm1.28 ctD / VVS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG786634346
Side View
Table 53.0%Crown 34.5°Girdle: MED-STKPavilion 40.8°Culet: LargeDepth 60.5%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 1
Current: $846 USD|Low: $398 USD|High: $1,910 USD|Avg: $980 USD|+2.7%
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 3, 2026
Retailer 11$414 USD
Retailer 12$463 USD
Retailer 5$464 USD
Retailer 3$514 USD
Retailer 14$514 USD
Retailer 9$660 USD
Retailer 13$690 USD
Retailer 1$846 USD
Retailer 8$1,253 USD
Retailer 10$1,441 USD
Retailer 6$1,494 USD
Retailer 4$1,634 USD
Retailer 2$1,652 USD
Retailer 7$1,887 USD

44 data points across 14 retailers

18 retailers$414 USD to $2,184 USD

A
Cheapest Retailer
-
$414 USD
A
Retailer 2
-
$463 USD
View
Final sale: no returns
A
Retailer 3
-
$464 USD
View
A
Retailer 4
-
$514 USD
View
Retailer 5
-
$514 USD
View
Price last confirmed 8 days ago
B+
Retailer 6
-
$660 USD
View
B+
Retailer 7
-
$690 USD
View
B+
Retailer 8
-
$713 USD
View
B+
Retailer 9
-
$846 USD
£666 GBP
View
B
Retailer 10
-
$1,253 USD
A$1,927 AUD
View
B
Retailer 11
-
$1,441 USD
View
B
Retailer 12
-
$1,494 USD
£1,176 GBP
View
B
Retailer 13
-
$1,634 USD
SGD 2,208 SGD
View
B
Retailer 14
-
$1,652 USD
View
B
Retailer 15
-
$1,686 USD
View
B
Retailer 16
-
$1,878 USD
View
B
Retailer 17
-
$1,887 USD
£1,486 GBP
View
Most Expensive
B
Queensmith
LG786634346 · Oct 27
$2,184 USD
£1,720 GBP
View
17 more retailers have this diamond
Prices start from $414 USDSave up to $1,770 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
$414 USD