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Cushion|Lab Grown|IGI

1.09ct E IF Cushion Lab Grown Diamond

ID • E/IF • IGI LG598377011

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG598377011

Diamond specifications and retailer prices

From $564 NZD
$318 USD
As of October 30, 2026
Save $2,967 NZD (84%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $3,531 NZD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.09ct lab-grown cushion diamond

This 1.09ct lab-grown cushion sits in the classic one-carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG598377011 or 598377011. Listed at 17 retailers as of October 29, 2026, with prices from $564 to $3,531, a $2,967 spread on the same certified stone. Brilliant Earth lists it at $3,531. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.09
Carat
E
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.8°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG598377011
Dimensions5.43 × 5.43 × 3.76 mm
L/W Ratio1.00
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
5.43 mm5.43 mm1.09 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG598377011
Side View
Table 62.0%Crown 33.8°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 69.2%

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: $3,531 NZD|Low: $564 NZD|High: $3,655 NZD|Avg: $1,414 NZD|-3.4%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 31, 2026
Retailer 5$564 NZD
Retailer 4$626 NZD
Retailer 7$664 NZD
Retailer 3$843 NZD
Retailer 6$905 NZD
Retailer 11$1,075 NZD
Retailer 2$1,105 NZD
Retailer 8$1,122 NZD
Retailer 10$1,522 NZD
Retailer 13$1,556 NZD
Retailer 12$2,434 NZD
Retailer 9$2,522 NZD
Brilliant Earth$3,531 NZD

43 data points across 13 retailers

17 retailers$564 NZD to $3,531 NZD

A
Cheapest Retailer
-
$564 NZD
$318 USD
Final sale: no returns
A
Retailer 2
-
$626 NZD
$353 USD
View
A
Retailer 3
-
$664 NZD
£294 GBP
View
A
Retailer 4
-
$843 NZD
$475 USD
View
A
Retailer 5
-
$905 NZD
$510 USD
View
A
Retailer 6
-
$1,075 NZD
ZAR 9,788 ZAR
View
A
Retailer 7
-
$1,105 NZD
£490 GBP
View
A
Retailer 8
-
$1,122 NZD
€602 EUR
View
A
Retailer 9
-
$1,187 NZD
$669 USD
View
A
Retailer 10
-
$1,522 NZD
A$1,320 AUD
View
B+
Retailer 11
-
$1,556 NZD
$877 USD
View
B+
Retailer 12
-
$2,101 NZD
$1,184 USD
View
B+
Retailer 13
-
$2,434 NZD
£1,080 GBP
View
B+
Retailer 14
-
$2,522 NZD
£1,119 GBP
View
B
Retailer 15
-
$2,596 NZD
$1,463 USD
View
Retailer 16
-
$3,123 NZD
$1,760 USD
View
Price last confirmed 22 days ago
Most Expensive
B
Brilliant Earth
21311968A · Oct 29
$3,531 NZD
$1,990 USD
View
16 more retailers have this diamond
Prices start from $564 NZDSave up to $2,967 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
1.09ct Cushion
$564 NZD