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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 $453 AUD
$318 USD
As of November 1, 2026
Save $2,380 AUD (84%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $2,833 AUD at Brilliant Earth · As of October 31, 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 31, 2026, with prices from $453 to $2,833, a $2,380 spread on the same certified stone. Brilliant Earth lists it at $2,833. 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: Nov 1
Current: $2,833 AUD|Low: $453 AUD|High: $2,876 AUD|Avg: $1,089 AUD|+13.1%
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
November 1, 2026
Retailer 5$453 AUD
Retailer 4$503 AUD
Retailer 6$531 AUD
Retailer 3$676 AUD
Retailer 9$726 AUD
Retailer 11$863 AUD
Retailer 7$879 AUD
Retailer 8$892 AUD
Retailer 10$1,221 AUD
Retailer 13$1,248 AUD
Retailer 12$1,953 AUD
Retailer 2$2,012 AUD
Brilliant Earth$2,833 AUD

43 data points across 13 retailers

17 retailers$453 AUD to $2,833 AUD

A
Cheapest Retailer
-
$453 AUD
$318 USD
Final sale: no returns
Retailer 2
-
$503 AUD
$353 USD
View
Price last confirmed 7 days ago
A
Retailer 3
-
$531 AUD
£294 GBP
View
A
Retailer 4
-
$676 AUD
$475 USD
View
A
Retailer 5
-
$726 AUD
$510 USD
View
A
Retailer 6
-
$863 AUD
ZAR 9,788 ZAR
View
A
Retailer 7
-
$879 AUD
£486 GBP
View
A
Retailer 8
-
$892 AUD
€597 EUR
View
A
Retailer 9
-
$952 AUD
$669 USD
View
A
Retailer 10
-
$1,221 AUD
View
B+
Retailer 11
-
$1,248 AUD
$877 USD
View
B+
Retailer 12
-
$1,685 AUD
$1,184 USD
View
B+
Retailer 13
-
$1,953 AUD
£1,080 GBP
View
B+
Retailer 14
-
$2,012 AUD
£1,113 GBP
View
B
Retailer 15
-
$2,083 AUD
$1,463 USD
View
Retailer 16
-
$2,506 AUD
$1,760 USD
View
Price last confirmed 24 days ago
Most Expensive
B
Brilliant Earth
21311968A · Oct 31
$2,833 AUD
$1,990 USD
View
16 more retailers have this diamond
Prices start from $453 AUDSave up to $2,380 AUD

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
$453 AUD