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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 $623 NZD
$351 USD
As of October 30, 2026
Save $2,642 NZD (81%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $3,265 NZD 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 $623 to $3,265, a $2,642 spread on the same certified stone. Brilliant Earth lists it at $3,265. 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: $3,265 NZD|Low: $499 NZD|High: $3,797 NZD|Avg: $1,747 NZD|-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 30, 2026
Retailer 11$623 NZD
Retailer 6$763 NZD
Retailer 13$1,123 NZD
Retailer 7$1,131 NZD
Retailer 10$1,134 NZD
Retailer 4$1,153 NZD
Retailer 8$1,187 NZD
Retailer 2$1,231 NZD
Retailer 3$1,249 NZD
Retailer 14$2,302 NZD
Retailer 5$2,378 NZD
Retailer 9$2,763 NZD
Retailer 12$2,772 NZD
Brilliant Earth$3,265 NZD

35 data points across 14 retailers

14 retailers$623 NZD to $3,265 NZD

A
Cheapest Retailer
-
$623 NZD
$351 USD
Final sale: no returns
Retailer 2
-
$763 NZD
$430 USD
View
Price last confirmed 18 days ago
A
Retailer 3
-
$1,123 NZD
$633 USD
View
A
Retailer 4
-
$1,131 NZD
€607 EUR
View
A
Retailer 5
-
$1,134 NZD
$639 USD
View
A
Retailer 6
-
$1,153 NZD
$650 USD
View
A
Retailer 7
-
$1,187 NZD
ZAR 10,806 ZAR
View
A
Retailer 8
-
$1,231 NZD
£546 GBP
View
A
Retailer 9
-
$1,249 NZD
$704 USD
View
B+
Retailer 10
-
$2,302 NZD
$1,297 USD
View
Retailer 11
-
$2,378 NZD
$1,340 USD
View
Price last confirmed 12 days ago
B
Retailer 12
-
$2,763 NZD
$1,557 USD
View
B
Retailer 13
-
$2,772 NZD
£1,230 GBP
View
Most Expensive
B
Brilliant Earth
21242472A · Oct 30
$3,265 NZD
$1,840 USD
View
13 more retailers have this diamond
Prices start from $623 NZDSave up to $2,642 NZD

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
$623 NZD