CaratHunter
Plans
Cushion|Lab Grown|IGI

4.05ct E FL Cushion Lab Grown Diamond

EX • E/FL • IGI LG797604470

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG797604470

Diamond specifications and retailer prices

From $9,705 NZD
$5,470 USD
As of October 30, 2026
Save $19,957 NZD (67%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $29,663 NZD at Riddles Jewelry · As of October 29, 2026
View at Riddles Jewelry

About this 4.05ct lab-grown cushion diamond

This 4.05ct 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 LG797604470 or 797604470. Listed at 8 retailers as of October 29, 2026, with prices from $9,705 to $29,663, a $19,957 spread on the same certified stone. Riddles Jewelry lists it at $29,663. 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

4.05
Carat
E
Colour
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.2°
Pavilion angle39.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG797604470
Dimensions11.34 × 8.35 × 5.56 mm
L/W Ratio1.36
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.34 mm8.35 mm4.05 ctE / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG797604470
Side View
Table 62.0%Crown 35.2°Girdle: MED-STKPavilion 39.5°Culet: NoneDepth 66.6%

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: $9,686 NZD|Low: $7,608 NZD|High: $54,730 NZD|Avg: $21,031 NZD|-16.9%
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
Retailer 15
Retailer 16
Riddles Jewelry
October 18, 2026
Retailer 1$9,686 NZD
Retailer 11$9,705 NZD
Retailer 10$10,316 NZD
Retailer 14$10,678 NZD
Retailer 8$10,743 NZD
Retailer 16$11,657 NZD
Retailer 15$14,056 NZD
Retailer 2$14,548 NZD
Retailer 3$16,767 NZD
Retailer 9$18,630 NZD
Retailer 6$23,227 NZD
Retailer 13$26,874 NZD
Retailer 12$28,361 NZD
Riddles Jewelry$29,663 NZD
Retailer 5$30,690 NZD
Retailer 7$39,230 NZD
Retailer 4$54,730 NZD

9 data points across 17 retailers

8 retailers$9,705 NZD to $29,663 NZD

Retailer 1
-
$9,686 NZD
$5,459 USD
Price last confirmed 9 days ago
A
Retailer 2
-
$9,705 NZD
$5,470 USD
View
A
Retailer 3
-
$10,316 NZD
CA$8,075 CAD
View
A
Retailer 4
-
$10,678 NZD
$6,018 USD
View
Final sale: no returns
B+
Retailer 5
-
$18,630 NZD
$10,500 USD
View
B
Retailer 6
-
$26,874 NZD
$15,146 USD
View
B
Retailer 7
-
$28,361 NZD
$15,985 USD
View
Most Expensive
B
Riddles Jewelry
1976264165 · Oct 29
$29,663 NZD
$16,718 USD
View
7 more retailers have this diamond
Prices start from $9,705 NZDSave up to $19,957 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
4.05ct Cushion
$9,705 NZD