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Cushion|Lab Grown|IGI

4.18ct E FL Cushion Lab Grown Diamond

ID • E/FL • IGI LG846658008

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG846658008

Diamond specifications and retailer prices

From $6,700 NZD
$3,776 USD
As of October 29, 2026
Save $14,876 NZD (69%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $21,575 NZD at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 4.18ct lab-grown cushion diamond

This 4.18ct lab-grown cushion sits in the three to five carat band, graded E colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG846658008 or 846658008. Listed at 7 retailers as of October 29, 2026, with prices from $6,700 to $21,575, a $14,876 spread on the same certified stone. Brilliant Earth lists it at $21,575. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

4.18
Carat
E
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.8°
Pavilion angle37.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG846658008
Dimensions11.31 × 8.11 × 5.57 mm
L/W Ratio1.39
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
11.31 mm8.11 mm4.18 ctE / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG846658008
Side View
Table 61.0%Crown 34.8°Girdle: MED-THKPavilion 37.2°Culet: NoneDepth 68.7%

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 29
Current: $21,575 NZD|Low: $6,700 NZD|High: $28,389 NZD|Avg: $14,112 NZD|-24.0%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 30, 2026
Retailer 7$6,700 NZD
Retailer 5$7,741 NZD
Retailer 2$8,568 NZD
Retailer 6$10,873 NZD
Retailer 3$12,791 NZD
Retailer 4$16,064 NZD
Brilliant Earth$21,575 NZD

6 data points across 7 retailers

7 retailers$6,700 NZD to $21,575 NZD

A
Cheapest Retailer
-
$6,700 NZD
$3,776 USD
A
Retailer 2
-
$6,968 NZD
$3,927 USD
View
A
Retailer 3
-
$8,568 NZD
$4,829 USD
View
A
Retailer 4
-
$10,873 NZD
$6,128 USD
View
A
Retailer 5
-
$12,791 NZD
€6,866 EUR
View
B+
Retailer 6
-
$16,064 NZD
£7,129 GBP
View
Most Expensive
B+
Brilliant Earth
22257780Y · Oct 30
$21,575 NZD
$12,160 USD
View
6 more retailers have this diamond
Prices start from $6,700 NZDSave up to $14,876 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
4.18ct Cushion
$6,700 NZD