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Cushion|Lab Grown|IGI

4.20ct E IF Cushion Lab Grown Diamond

ID • E/IF • IGI LG805652143

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG805652143

Diamond specifications and retailer prices

From $3,678 NZD
£1,632 GBP
As of October 30, 2026
Save $11,714 NZD (76%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $15,391 NZD at Taylor and Hart · As of October 30, 2026
View at Taylor and Hart

About this 4.2ct lab-grown cushion diamond

This 4.2ct lab-grown cushion sits in the three to five carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG805652143 or 805652143. Listed at 18 retailers as of October 30, 2026, with prices from $3,678 to $15,391, a $11,714 spread on the same certified stone. Taylor and Hart lists it at $15,391. 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

4.20
Carat
E
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.8°
Pavilion angle39.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG805652143
Dimensions11.28 × 7.92 × 5.69 mm
L/W Ratio1.42
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.28 mm7.92 mm4.20 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG805652143
Side View
Table 66.0%Crown 38.8°Girdle: MED-STKPavilion 39.3°Culet: NoneDepth 71.8%

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: $6,059 NZD|Low: $3,415 NZD|High: $16,201 NZD|Avg: $7,994 NZD|+0.6%
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
Taylor and Hart
October 31, 2026
Retailer 10$3,678 NZD
Retailer 2$4,249 NZD
Retailer 13$4,489 NZD
Retailer 14$4,824 NZD
Retailer 15$5,087 NZD
Retailer 1$6,059 NZD
Retailer 9$6,434 NZD
Retailer 12$6,888 NZD
Retailer 7$7,237 NZD
Retailer 4$8,355 NZD
Retailer 8$8,803 NZD
Retailer 11$9,371 NZD
Retailer 16$10,318 NZD
Retailer 5$11,861 NZD
Retailer 6$12,599 NZD
Retailer 3$14,726 NZD
Taylor and Hart$15,391 NZD

21 data points across 17 retailers

18 retailers$3,678 NZD to $15,391 NZD

A
Cheapest Retailer
-
$3,678 NZD
£1,632 GBP
A
Retailer 2
-
$4,249 NZD
$2,395 USD
View
Final sale: no returns
Retailer 3
-
$4,285 NZD
$2,415 USD
View
Price last confirmed 20 days ago
A
Retailer 4
-
$4,489 NZD
$2,530 USD
View
A
Retailer 5
-
$4,824 NZD
$2,719 USD
View
A
Retailer 6
-
$5,087 NZD
HK$22,400 HKD
View
A
Retailer 7
-
$6,059 NZD
£2,689 GBP
View
A
Retailer 8
-
$6,434 NZD
$3,626 USD
View
A
Retailer 9
-
$6,888 NZD
€3,697 EUR
View
A
Retailer 10
-
$7,237 NZD
$4,079 USD
View
A
Retailer 11
-
$8,355 NZD
£3,708 GBP
View
Retailer 12
-
$8,803 NZD
A$7,633 AUD
View
Price last confirmed 9 days ago
A
Retailer 13
-
$9,371 NZD
ZAR 85,319 ZAR
View
A
Retailer 14
-
$10,318 NZD
$5,815 USD
View
A
Retailer 15
-
$11,861 NZD
$6,685 USD
View
A
Retailer 16
-
$12,599 NZD
£5,591 GBP
View
B+
Retailer 17
-
$14,726 NZD
SGD 11,216 SGD
View
Most Expensive
B+
Taylor and Hart
AP5JNQW · Oct 30
$15,391 NZD
$8,675 USD
View
17 more retailers have this diamond
Prices start from $3,678 NZDSave up to $11,714 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
4.20ct Cushion
$3,678 NZD