Cushion|Lab Grown|IGI

1.05ct E FL Cushion Lab Grown Diamond

GD • E/FL • IGI LG818657598

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

Certificate IGI LG818657598

Diamond specifications and retailer prices

From $351 USD
As of October 28, 2026
Save $1,609 USD (82%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $1,960 USD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.05ct lab-grown cushion diamond

This 1.05ct lab-grown cushion sits in the classic one-carat band, graded E colour (colourless) and FL clarity (flawless or internally-flawless), with a standard cut grade and certified by IGI LG818657598 or 818657598. Listed at 14 retailers as of October 28, 2026, with prices from $351 to $1,960, a $1,609 spread on the same certified stone. Brilliant Earth lists it at $1,960. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.05
Carat
E
Color
FL
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.7°
Pavilion angle42.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818657598
Dimensions6.15 × 5.99 × 3.89 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
6.15 mm5.99 mm1.05 ctE / FL
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818657598
Side View
Table 61.0%Crown 34.7°Girdle: THN-STKPavilion 42.2°Culet: NoneDepth 64.9%

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: $1,960 USD|Low: $281 USD|High: $2,140 USD|Avg: $986 USD|-8.4%
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 29, 2026
Retailer 11$351 USD
Retailer 6$430 USD
Retailer 12$633 USD
Retailer 7$637 USD
Retailer 10$639 USD
Retailer 4$650 USD
Retailer 8$669 USD
Retailer 2$692 USD
Retailer 14$704 USD
Retailer 13$1,297 USD
Retailer 5$1,340 USD
Retailer 9$1,557 USD
Retailer 3$1,680 USD
Brilliant Earth$1,960 USD

35 data points across 14 retailers

14 retailers$351 USD to $1,960 USD

A
Cheapest Retailer
-
$351 USD
Final sale: no returns
A
Retailer 2
-
$430 USD
View
Price last confirmed 17 days ago
A
Retailer 3
-
$633 USD
View
A
Retailer 4
-
$637 USD
€607 EUR
View
A
Retailer 5
-
$639 USD
View
B+
Retailer 6
-
$650 USD
View
A
Retailer 7
-
$669 USD
ZAR 10,806 ZAR
View
A
Retailer 8
-
$692 USD
£545 GBP
View
A
Retailer 9
-
$704 USD
View
B
Retailer 10
-
$1,297 USD
View
B
Retailer 11
-
$1,340 USD
View
Price last confirmed 10 days ago
B
Retailer 12
-
$1,557 USD
View
B
Retailer 13
-
$1,680 USD
£1,323 GBP
View
Most Expensive
B
Brilliant Earth
21241761A · Oct 29
$1,960 USD
View
13 more retailers have this diamond
Prices start from $351 USDSave up to $1,609 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
1.05ct Cushion
$351 USD