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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 $2,951 AUD
£1,632 GBP
As of October 30, 2026
Save $9,398 AUD (76%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $12,349 AUD 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 $2,951 to $12,349, a $9,398 spread on the same certified stone. Taylor and Hart lists it at $12,349. 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: $2,951 AUD|Low: $2,740 AUD|High: $12,999 AUD|Avg: $6,463 AUD|+1.8%
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 30, 2026
Retailer 1$2,951 AUD
Retailer 16$3,410 AUD
Retailer 12$3,602 AUD
Retailer 13$3,871 AUD
Retailer 14$4,082 AUD
Retailer 9$4,861 AUD
Retailer 5$5,310 AUD
Retailer 11$5,526 AUD
Retailer 7$5,807 AUD
Retailer 3$6,704 AUD
Retailer 8$7,063 AUD
Retailer 10$7,518 AUD
Retailer 15$8,278 AUD
Retailer 4$9,517 AUD
Retailer 6$10,108 AUD
Retailer 2$11,816 AUD
Taylor and Hart$12,349 AUD

20 data points across 17 retailers

18 retailers$2,951 AUD to $12,349 AUD

A
Cheapest Retailer
-
$2,951 AUD
£1,632 GBP
A
Retailer 2
-
$3,410 AUD
$2,395 USD
View
Final sale: no returns
Retailer 3
-
$3,438 AUD
$2,415 USD
View
Price last confirmed 20 days ago
A
Retailer 4
-
$3,602 AUD
$2,530 USD
View
A
Retailer 5
-
$3,871 AUD
$2,719 USD
View
A
Retailer 6
-
$4,082 AUD
HK$22,400 HKD
View
A
Retailer 7
-
$4,861 AUD
£2,689 GBP
View
A
Retailer 8
-
$5,310 AUD
$3,730 USD
View
A
Retailer 9
-
$5,526 AUD
€3,697 EUR
View
A
Retailer 10
-
$5,807 AUD
$4,079 USD
View
A
Retailer 11
-
$6,704 AUD
£3,708 GBP
View
Retailer 12
-
$7,063 AUD
View
Price last confirmed 8 days ago
A
Retailer 13
-
$7,518 AUD
ZAR 85,319 ZAR
View
A
Retailer 14
-
$8,278 AUD
$5,815 USD
View
A
Retailer 15
-
$9,517 AUD
$6,685 USD
View
A
Retailer 16
-
$10,108 AUD
£5,591 GBP
View
B+
Retailer 17
-
$11,816 AUD
SGD 11,216 SGD
View
Most Expensive
B+
Taylor and Hart
AP5JNQW · Oct 30
$12,349 AUD
$8,675 USD
View
17 more retailers have this diamond
Prices start from $2,951 AUDSave up to $9,398 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
4.20ct Cushion
$2,951 AUD