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Cushion|Lab Grown|IGI

1.28ct E FL Cushion Lab Grown Diamond

GD • E/FL • IGI LG840622511

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

Certificate IGI LG840622511

Diamond specifications and retailer prices

From $749 NZD
$422 USD
As of October 30, 2026
Save $3,376 NZD (82%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $4,125 NZD at Helzberg Diamonds · As of October 31, 2026
View at Helzberg 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 E colour (colourless) and FL clarity (flawless or internally-flawless), with a standard cut grade and certified by IGI LG840622511 or 840622511. Listed at 18 retailers as of October 30, 2026, with prices from $749 to $4,125, a $3,376 spread on the same certified stone. Helzberg Diamonds lists it at $4,125. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.28
Carat
E
Colour
FL
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.1°
Pavilion angle36.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG840622511
Dimensions6.20 × 6.14 × 4.10 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
6.20 mm6.14 mm1.28 ctE / FL
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG840622511
Side View
Table 62.0%Crown 35.1°Girdle: MED-STKPavilion 36.2°Culet: NoneDepth 66.8%

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: Oct 30
Current: $4,125 NZD|Low: $749 NZD|High: $4,808 NZD|Avg: $2,159 NZD
Helzberg Diamonds
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
Retailer 17
Retailer 18
October 31, 2026
Retailer 7$749 NZD
Retailer 17$829 NZD
Retailer 14$879 NZD
Retailer 5$1,247 NZD
Retailer 16$1,251 NZD
Retailer 8$1,320 NZD
Retailer 2$1,388 NZD
Retailer 15$1,424 NZD
Retailer 11$1,498 NZD
Retailer 3$1,618 NZD
Retailer 12$2,065 NZD
Retailer 6$2,732 NZD
Retailer 9$2,765 NZD
Retailer 10$2,874 NZD
Retailer 4$3,185 NZD
Retailer 18$3,243 NZD
Retailer 13$3,371 NZD
Helzberg Diamonds$4,125 NZD

18 data points across 18 retailers

18 retailers$749 NZD to $4,125 NZD

A
Cheapest Retailer
-
$749 NZD
$422 USD
Final sale: no returns
A
Retailer 2
-
$829 NZD
$467 USD
View
A
Retailer 3
-
$879 NZD
£390 GBP
View
A
Retailer 4
-
$1,247 NZD
$703 USD
View
B+
Retailer 5
-
$1,251 NZD
$705 USD
View
A
Retailer 6
-
$1,320 NZD
$744 USD
View
A
Retailer 7
-
$1,388 NZD
€745 EUR
View
A
Retailer 8
-
$1,424 NZD
ZAR 12,963 ZAR
View
B+
Retailer 9
-
$1,498 NZD
£665 GBP
View
B+
Retailer 10
-
$1,618 NZD
$912 USD
View
B+
Retailer 11
-
$2,065 NZD
$1,164 USD
View
B
Retailer 12
-
$2,732 NZD
$1,540 USD
View
B
Retailer 13
-
$2,765 NZD
SGD 2,106 SGD
View
Retailer 14
-
$2,874 NZD
$1,620 USD
View
Price last confirmed 17 days ago
B
Retailer 15
-
$3,185 NZD
$1,795 USD
View
B
Retailer 16
-
$3,243 NZD
£1,439 GBP
View
B
Retailer 17
-
$3,371 NZD
$1,900 USD
View
Most Expensive
B
Helzberg Diamonds
ZXZOKGMIILHH · Oct 31
$4,125 NZD
$2,325 USD
View
17 more retailers have this diamond
Prices start from $749 NZDSave up to $3,376 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
$749 NZD