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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 $5,376 AUD
$3,776 USD
As of October 29, 2026
Save $11,935 AUD (69%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $17,311 AUD 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 $5,376 to $17,311, a $11,935 spread on the same certified stone. Brilliant Earth lists it at $17,311. 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: $17,311 AUD|Low: $5,376 AUD|High: $22,778 AUD|Avg: $11,323 AUD|-24.0%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 30, 2026
Retailer 7$5,376 AUD
Retailer 5$6,211 AUD
Retailer 2$6,875 AUD
Retailer 6$8,724 AUD
Retailer 3$10,263 AUD
Retailer 4$12,889 AUD
Brilliant Earth$17,311 AUD

6 data points across 7 retailers

7 retailers$5,376 AUD to $17,311 AUD

A
Cheapest Retailer
-
$5,376 AUD
$3,776 USD
A
Retailer 2
-
$5,590 AUD
$3,927 USD
View
A
Retailer 3
-
$6,875 AUD
$4,829 USD
View
A
Retailer 4
-
$8,724 AUD
$6,128 USD
View
A
Retailer 5
-
$10,263 AUD
€6,866 EUR
View
B+
Retailer 6
-
$12,889 AUD
£7,129 GBP
View
Most Expensive
B+
Brilliant Earth
22257780Y · Oct 30
$17,311 AUD
$12,160 USD
View
6 more retailers have this diamond
Prices start from $5,376 AUDSave up to $11,935 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
4.18ct Cushion
$5,376 AUD