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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 $318 USD
As of October 30, 2026
Save $1,672 USD (84%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $1,990 USD 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 $318 to $1,990, a $1,672 spread on the same certified stone. Brilliant Earth lists it at $1,990. 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
Color
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
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $1,990 USD|Low: $318 USD|High: $2,060 USD|Avg: $783 USD|-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
Retailer 14
October 30, 2026
Retailer 5$318 USD
Retailer 4$353 USD
Retailer 9$375 USD
Retailer 3$475 USD
Retailer 12$475 USD
Retailer 11$606 USD
Retailer 2$623 USD
Retailer 7$632 USD
Retailer 6$669 USD
Retailer 10$858 USD
Retailer 14$877 USD
Retailer 13$1,372 USD
Retailer 8$1,421 USD
Brilliant Earth$1,990 USD

43 data points across 14 retailers

17 retailers$318 USD to $1,990 USD

A
Cheapest Retailer
-
$318 USD
Final sale: no returns
A
Retailer 2
-
$353 USD
View
A
Retailer 3
-
$375 USD
£295 GBP
View
A
Retailer 4
-
$475 USD
View
A
Retailer 5
-
$475 USD
View
A
Retailer 6
-
$606 USD
ZAR 9,788 ZAR
View
A
Retailer 7
-
$623 USD
£490 GBP
View
A
Retailer 8
-
$632 USD
€602 EUR
View
A
Retailer 9
-
$669 USD
View
A
Retailer 10
-
$858 USD
A$1,320 AUD
View
B+
Retailer 11
-
$877 USD
View
B+
Retailer 12
-
$1,184 USD
View
B+
Retailer 13
-
$1,372 USD
£1,080 GBP
View
B+
Retailer 14
-
$1,421 USD
£1,119 GBP
View
B
Retailer 15
-
$1,463 USD
View
Retailer 16
-
$1,760 USD
View
Price last confirmed 21 days ago
Most Expensive
B
Brilliant Earth
21311968A · Oct 29
$1,990 USD
View
16 more retailers have this diamond
Prices start from $318 USDSave up to $1,672 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
1.09ct Cushion
$318 USD