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Cushion|Lab Grown|IGI

1.00ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG818640099

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG818640099

Diamond specifications and retailer prices

From $1,130 NZD
As of November 3, 2026
Save $3,500 NZD (76%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $4,630 NZD at Brilliant Earth · As of November 4, 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 D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG818640099 or 818640099. Listed at 16 retailers as of November 3, 2026, with prices from $1,130 to $4,630, a $3,500 spread on the same certified stone. Brilliant Earth lists it at $4,630. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.00
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.8°
Pavilion angle41.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818640099
Dimensions6.98 × 5.35 × 3.55 mm
L/W Ratio1.30
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
6.98 mm5.35 mm1.00 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818640099
Side View
Table 62.0%Crown 33.8°Girdle: THN-STKPavilion 41.4°Culet: NoneDepth 66.4%

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: Nov 3
Current: $4,630 NZD|Low: $679 NZD|High: $4,772 NZD|Avg: $2,268 NZD|-3.0%
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
Retailer 15
Retailer 16
November 4, 2026
Retailer 16$956 NZD
Retailer 15$1,130 NZD
Retailer 14$1,157 NZD
Retailer 13$1,304 NZD
Retailer 7$1,419 NZD
Retailer 5$1,439 NZD
Retailer 11$1,588 NZD
Retailer 2$1,740 NZD
Retailer 9$1,825 NZD
Retailer 8$2,297 NZD
Retailer 12$2,317 NZD
Retailer 6$2,792 NZD
Retailer 4$3,454 NZD
Retailer 3$3,709 NZD
Retailer 10$4,419 NZD
Brilliant Earth$4,630 NZD

40 data points across 16 retailers

16 retailers$1,130 NZD to $4,630 NZD

Retailer 1
-
$956 NZD
Price last confirmed 17 days ago
Final sale: no returns
A
Retailer 2
-
$1,130 NZD
View
A
Retailer 3
-
$1,157 NZD
View
A
Retailer 4
-
$1,304 NZD
View
A
Retailer 5
-
$1,419 NZD
View
A
Retailer 6
-
$1,439 NZD
View
B+
Retailer 7
-
$1,588 NZD
View
B+
Retailer 8
-
$1,740 NZD
View
B+
Retailer 9
-
$1,825 NZD
View
Retailer 10
-
$2,297 NZD
View
Price last confirmed 57 days ago
B+
Retailer 11
-
$2,317 NZD
View
B
Retailer 12
-
$2,792 NZD
View
B
Retailer 13
-
$3,454 NZD
View
B
Retailer 14
-
$3,709 NZD
View
B
Retailer 15
-
$4,419 NZD
View
Most Expensive
B
Brilliant Earth
21086551A · Nov 4
$4,630 NZD
$2,610 USD
View
15 more retailers have this diamond
Prices start from $1,130 NZDSave up to $3,500 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
1.00ct Cushion
$1,130 NZD