Cushion|Lab Grown|IGI

1.00ct E FL Cushion Lab Grown Diamond

ID • E/FL • IGI LG818662844

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

Certificate IGI LG818662844

Diamond specifications and retailer prices

From $350 USD
As of October 28, 2026
Save $1,540 USD (81%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $1,890 USD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1ct lab-grown cushion diamond

This 1ct 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 LG818662844 or 818662844. Listed at 15 retailers as of October 28, 2026, with prices from $350 to $1,890, a $1,540 spread on the same certified stone. Brilliant Earth lists it at $1,890. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.00
Carat
E
Color
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.4°
Pavilion angle38.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818662844
Dimensions5.98 × 5.81 × 3.76 mm
L/W Ratio1.03
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 mm5.81 mm1.00 ctE / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818662844
Side View
Table 61.0%Crown 34.4°Girdle: MED-STKPavilion 38.3°Culet: NoneDepth 64.7%

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 28
Current: $1,890 USD|Low: $350 USD|High: $2,030 USD|Avg: $911 USD|-6.9%
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 29, 2026
Retailer 14$350 USD
Retailer 10$412 USD
Retailer 7$434 USD
Retailer 13$591 USD
Retailer 5$605 USD
Retailer 15$631 USD
Retailer 8$635 USD
Retailer 11$666 USD
Retailer 2$689 USD
Retailer 4$700 USD
Retailer 6$1,130 USD
Retailer 3$1,293 USD
Retailer 12$1,553 USD
Retailer 9$1,562 USD
Brilliant Earth$1,890 USD

36 data points across 15 retailers

15 retailers$350 USD to $1,890 USD

A
Cheapest Retailer
-
$350 USD
Final sale: no returns
A
Retailer 2
-
$412 USD
£325 GBP
View
Retailer 3
-
$434 USD
View
Price last confirmed 17 days ago
A
Retailer 4
-
$591 USD
View
A
Retailer 5
-
$605 USD
View
A
Retailer 6
-
$631 USD
View
A
Retailer 7
-
$635 USD
€605 EUR
View
A
Retailer 8
-
$666 USD
ZAR 10,764 ZAR
View
A
Retailer 9
-
$689 USD
£542 GBP
View
A
Retailer 10
-
$700 USD
View
B+
Retailer 11
-
$1,130 USD
View
B+
Retailer 12
-
$1,293 USD
View
B
Retailer 13
-
$1,553 USD
View
B
Retailer 14
-
$1,562 USD
£1,230 GBP
View
Most Expensive
B
Brilliant Earth
21242302A · Oct 29
$1,890 USD
View
14 more retailers have this diamond
Prices start from $350 USDSave up to $1,540 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
1.00ct Cushion
$350 USD