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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 $400 NZD
As of November 4, 2026
Save $1,732 NZD (81%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $2,132 NZD 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 $400 to $2,132, a $1,732 spread on the same certified stone. Reve Diamonds lists it at $2,132. 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

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: $589 NZD|Low: $386 NZD|High: $2,437 NZD|Avg: $1,102 NZD|-1.5%
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 5, 2026
Retailer 12$400 NZD
Retailer 8$445 NZD
Retailer 1$589 NZD
Retailer 16$736 NZD
Retailer 15$767 NZD
Retailer 4$770 NZD
Retailer 10$808 NZD
Retailer 2$909 NZD
Retailer 3$1,018 NZD
Retailer 14$1,083 NZD
Retailer 13$1,187 NZD
Retailer 7$1,290 NZD
Retailer 6$1,386 NZD
Retailer 5$1,523 NZD
Retailer 9$1,548 NZD
Retailer 11$2,072 NZD
Reve Diamonds$2,132 NZD

22 data points across 17 retailers

17 retailers$400 NZD to $2,132 NZD

A
Cheapest Retailer
-
$400 NZD
Final sale: no returns
Retailer 2
-
$445 NZD
View
Price last confirmed 11 days ago
A
Retailer 3
-
$589 NZD
View
A
Retailer 4
-
$736 NZD
View
A
Retailer 5
-
$767 NZD
View
A
Retailer 6
-
$770 NZD
View
A
Retailer 7
-
$808 NZD
View
A
Retailer 8
-
$909 NZD
View
B+
Retailer 9
-
$1,018 NZD
View
B+
Retailer 10
-
$1,083 NZD
View
B+
Retailer 11
-
$1,187 NZD
View
Retailer 12
-
$1,290 NZD
View
Price last confirmed 8 days ago
Retailer 13
-
$1,386 NZD
View
Price last confirmed 7 days ago
B+
Retailer 14
-
$1,523 NZD
View
B+
Retailer 15
-
$1,548 NZD
View
B
Retailer 16
-
$2,072 NZD
View
Most Expensive
B
Reve Diamonds
7BA50A69E · Nov 4
$2,132 NZD
$1,199 USD
View
16 more retailers have this diamond
Prices start from $400 NZDSave up to $1,732 NZD

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
$400 NZD