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Cushion|Lab Grown|IGI

4.15ct E FL Cushion Lab Grown Diamond

EX • E/FL • IGI LG811675428

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG811675428

Diamond specifications and retailer prices

From $8,481 AUD
CA$8,274 CAD
As of October 30, 2026
Save $37,433 AUD (82%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $45,914 AUD at With Clarity · As of October 31, 2026
View at With Clarity

About this 4.15ct lab-grown cushion diamond

This 4.15ct 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 LG811675428 or 811675428. Listed at 21 retailers as of October 30, 2026, with prices from $8,481 to $45,914, a $37,433 spread on the same certified stone. With Clarity lists it at $45,914. 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

4.15
Carat
E
Colour
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.3°
Pavilion angle37.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG811675428
Dimensions11.33 × 8.46 × 5.62 mm
L/W Ratio1.34
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.33 mm8.46 mm4.15 ctE / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG811675428
Side View
Table 61.0%Crown 35.3°Girdle: MED-STKPavilion 37.1°Culet: NoneDepth 66.4%

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: $11,632 AUD|Low: $8,751 AUD|High: $23,317 AUD|Avg: $14,816 AUD|+0.5%
Retailer 1
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
November 1, 2026
Retailer 14$9,064 AUD
Retailer 11$9,137 AUD
Retailer 2$9,171 AUD
Retailer 6$9,750 AUD
Retailer 8$10,365 AUD
Retailer 1$11,632 AUD
Retailer 4$12,866 AUD
Retailer 7$14,182 AUD
Retailer 13$15,315 AUD
Retailer 10$18,544 AUD
Retailer 9$19,292 AUD
Retailer 12$20,218 AUD
Retailer 3$23,304 AUD
Retailer 5$23,317 AUD

44 data points across 14 retailers

21 retailers$8,481 AUD to $45,914 AUD

A
Cheapest Retailer
-
$8,481 AUD
CA$8,274 CAD
Retailer 2
-
$9,064 AUD
$6,367 USD
View
Price last confirmed 16 days ago
A
Retailer 3
-
$9,075 AUD
$6,375 USD
View
A
Retailer 4
-
$9,137 AUD
$6,418 USD
View
A
Retailer 5
-
$9,171 AUD
$6,442 USD
View
A
Retailer 6
-
$9,750 AUD
$6,849 USD
View
A
Retailer 7
-
$10,365 AUD
$7,281 USD
View
Final sale: no returns
A
Retailer 8
-
$11,632 AUD
£6,434 GBP
View
A
Retailer 9
-
$12,866 AUD
£7,116 GBP
View
B+
Retailer 10
-
$14,182 AUD
€9,488 EUR
View
B+
Retailer 11
-
$15,315 AUD
$10,758 USD
View
B+
Retailer 12
-
$18,544 AUD
£10,257 GBP
View
B+
Retailer 13
-
$19,292 AUD
ZAR 218,929 ZAR
View
B+
Retailer 14
-
$20,218 AUD
$14,202 USD
View
B+
Retailer 15
-
$22,094 AUD
$15,520 USD
View
Retailer 16
-
$23,304 AUD
$16,370 USD
View
Price last confirmed 39 days ago
B
Retailer 17
-
$23,317 AUD
$16,379 USD
View
B
Retailer 18
-
$24,388 AUD
$17,131 USD
View
B
Retailer 19
-
$25,210 AUD
$17,709 USD
View
B
Retailer 20
-
$32,094 AUD
$22,544 USD
View
Most Expensive
B
With Clarity
811675428 · Oct 31
$45,914 AUD
$32,252 USD
View
20 more retailers have this diamond
Prices start from $8,481 AUDSave up to $37,433 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
4.15ct Cushion
$8,481 AUD