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Cushion|Lab Grown|IGI

1.05ct E FL Cushion Lab Grown Diamond

EX • E/FL • IGI LG818662839

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

Certificate IGI LG818662839

Diamond specifications and retailer prices

From $500 AUD
$351 USD
As of October 30, 2026
Save $2,120 AUD (81%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $2,619 AUD at Brilliant Earth · As of October 30, 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 top-tier cut grade and certified by IGI LG818662839 or 818662839. Listed at 14 retailers as of October 30, 2026, with prices from $500 to $2,619, a $2,120 spread on the same certified stone. Brilliant Earth lists it at $2,619. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.05
Carat
E
Colour
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.7°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818662839
Dimensions6.18 × 6.06 × 3.84 mm
L/W Ratio1.02
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
6.18 mm6.06 mm1.05 ctE / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818662839
Side View
Table 62.0%Crown 34.7°Girdle: MediumPavilion 40.6°Culet: NoneDepth 63.4%

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: Oct 30
Current: $2,619 AUD|Low: $400 AUD|High: $3,047 AUD|Avg: $1,394 AUD|-14.0%
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 31, 2026
Retailer 12$500 AUD
Retailer 6$612 AUD
Retailer 7$840 AUD
Retailer 14$901 AUD
Retailer 8$907 AUD
Retailer 11$910 AUD
Retailer 9$952 AUD
Retailer 2$979 AUD
Retailer 4$1,002 AUD
Retailer 3$1,847 AUD
Retailer 5$1,908 AUD
Retailer 10$2,217 AUD
Retailer 13$2,224 AUD
Brilliant Earth$2,619 AUD

36 data points across 14 retailers

14 retailers$500 AUD to $2,619 AUD

A
Cheapest Retailer
-
$500 AUD
$351 USD
Final sale: no returns
Retailer 2
-
$612 AUD
$430 USD
View
Price last confirmed 18 days ago
A
Retailer 3
-
$840 AUD
$590 USD
View
A
Retailer 4
-
$901 AUD
$633 USD
View
A
Retailer 5
-
$907 AUD
€607 EUR
View
A
Retailer 6
-
$910 AUD
$639 USD
View
A
Retailer 7
-
$952 AUD
ZAR 10,806 ZAR
View
A
Retailer 8
-
$979 AUD
£542 GBP
View
A
Retailer 9
-
$1,002 AUD
$704 USD
View
B+
Retailer 10
-
$1,847 AUD
$1,297 USD
View
Retailer 11
-
$1,908 AUD
$1,340 USD
View
Price last confirmed 12 days ago
B
Retailer 12
-
$2,217 AUD
$1,557 USD
View
B
Retailer 13
-
$2,224 AUD
£1,230 GBP
View
Most Expensive
B
Brilliant Earth
21242472A · Oct 30
$2,619 AUD
$1,840 USD
View
13 more retailers have this diamond
Prices start from $500 AUDSave up to $2,120 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
1.05ct Cushion
$500 AUD