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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 $10,570 NZD
CA$8,274 CAD
As of October 30, 2026
Save $46,655 NZD (82%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $57,225 NZD at With Clarity · As of October 30, 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 $10,570 to $57,225, a $46,655 spread on the same certified stone. With Clarity lists it at $57,225. 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: $14,497 NZD|Low: $8,456 NZD|High: $29,062 NZD|Avg: $18,452 NZD|+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
October 30, 2026
Retailer 8$10,907 NZD
Retailer 14$11,297 NZD
Retailer 11$11,387 NZD
Retailer 2$11,430 NZD
Retailer 6$12,152 NZD
Retailer 1$14,497 NZD
Retailer 4$16,035 NZD
Retailer 9$17,801 NZD
Retailer 13$19,088 NZD
Retailer 10$23,113 NZD
Retailer 7$24,045 NZD
Retailer 12$25,199 NZD
Retailer 3$29,045 NZD
Retailer 5$29,062 NZD

42 data points across 14 retailers

21 retailers$10,570 NZD to $57,225 NZD

A
Cheapest Retailer
-
$10,570 NZD
CA$8,274 CAD
A
Retailer 2
-
$10,907 NZD
$6,147 USD
View
Final sale: no returns
Retailer 3
-
$11,297 NZD
$6,367 USD
View
Price last confirmed 14 days ago
A
Retailer 4
-
$11,311 NZD
$6,375 USD
View
A
Retailer 5
-
$11,387 NZD
$6,418 USD
View
A
Retailer 6
-
$11,430 NZD
$6,442 USD
View
A
Retailer 7
-
$12,152 NZD
$6,849 USD
View
A
Retailer 8
-
$14,497 NZD
£6,434 GBP
View
A
Retailer 9
-
$16,035 NZD
£7,116 GBP
View
B+
Retailer 10
-
$17,801 NZD
€9,555 EUR
View
B+
Retailer 11
-
$19,088 NZD
$10,758 USD
View
B+
Retailer 12
-
$23,113 NZD
£10,257 GBP
View
B+
Retailer 13
-
$24,045 NZD
ZAR 218,929 ZAR
View
B+
Retailer 14
-
$25,199 NZD
$14,202 USD
View
B+
Retailer 15
-
$27,537 NZD
$15,520 USD
View
Retailer 16
-
$29,045 NZD
$16,370 USD
View
Price last confirmed 37 days ago
B
Retailer 17
-
$29,062 NZD
$16,379 USD
View
B
Retailer 18
-
$30,396 NZD
$17,131 USD
View
B
Retailer 19
-
$31,421 NZD
$17,709 USD
View
B
Retailer 20
-
$40,000 NZD
$22,544 USD
View
Most Expensive
B
With Clarity
811675428 · Oct 30
$57,225 NZD
$32,252 USD
View
20 more retailers have this diamond
Prices start from $10,570 NZDSave up to $46,655 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
4.15ct Cushion
$10,570 NZD