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Cushion|Lab Grown|IGI

1.09ct E FL Cushion Lab Grown Diamond

ID • E/FL • IGI LG818663196

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

Certificate IGI LG818663196

Diamond specifications and retailer prices

From $378 USD
As of October 30, 2026
Save $1,582 USD (81%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $1,960 USD at Brilliant Earth · As of October 30, 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 FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG818663196 or 818663196. Listed at 15 retailers as of October 30, 2026, with prices from $378 to $1,960, a $1,582 spread on the same certified stone. Brilliant Earth lists it at $1,960. 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
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.2°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818663196
Dimensions5.98 × 5.97 × 4.01 mm
L/W Ratio1.00
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
5.98 mm5.97 mm1.09 ctE / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818663196
Side View
Table 60.0%Crown 35.2°Girdle: MED-THKPavilion 40.3°Culet: NoneDepth 67.2%

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: $1,960 USD|Low: $378 USD|High: $2,270 USD|Avg: $1,015 USD|-13.7%
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
Retailer 15
October 30, 2026
Retailer 14$378 USD
Retailer 2$445 USD
Retailer 5$470 USD
Retailer 15$677 USD
Retailer 9$683 USD
Retailer 13$687 USD
Retailer 6$705 USD
Retailer 11$721 USD
Retailer 4$734 USD
Retailer 8$752 USD
Retailer 3$1,392 USD
Retailer 7$1,395 USD
Retailer 12$1,635 USD
Retailer 10$1,690 USD
Brilliant Earth$1,960 USD

36 data points across 15 retailers

15 retailers$378 USD to $1,960 USD

A
Cheapest Retailer
-
$378 USD
Final sale: no returns
A
Retailer 2
-
$445 USD
£350 GBP
View
A
Retailer 3
-
$470 USD
View
A
Retailer 4
-
$677 USD
View
A
Retailer 5
-
$683 USD
€650 EUR
View
A
Retailer 6
-
$687 USD
View
A
Retailer 7
-
$705 USD
View
A
Retailer 8
-
$721 USD
ZAR 11,646 ZAR
View
A
Retailer 9
-
$734 USD
View
A
Retailer 10
-
$752 USD
£592 GBP
View
B+
Retailer 11
-
$1,392 USD
View
Retailer 12
-
$1,395 USD
View
Price last confirmed 12 days ago
B
Retailer 13
-
$1,635 USD
View
B+
Retailer 14
-
$1,690 USD
£1,331 GBP
View
Most Expensive
B
Brilliant Earth
21242470A · Oct 30
$1,960 USD
View
14 more retailers have this diamond
Prices start from $378 USDSave up to $1,582 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
$378 USD