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Cushion|Lab Grown|IGI

4.05ct E IF Cushion Lab Grown Diamond

EX • E/IF • IGI LG771607368

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG771607368

Diamond specifications and retailer prices

From $6,231 AUD
£3,446 GBP
As of October 30, 2026
Save $20,411 AUD (77%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $26,642 AUD at Taylor and Hart · As of October 30, 2026
View at Taylor and Hart

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 IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG771607368 or 771607368. Listed at 16 retailers as of October 30, 2026, with prices from $6,231 to $26,642, a $20,411 spread on the same certified stone. Taylor and Hart lists it at $26,642. 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
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.9°
Pavilion angle37.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG771607368
Dimensions10.67 × 8.17 × 5.52 mm
L/W Ratio1.31
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.67 mm8.17 mm4.05 ctE / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG771607368
Side View
Table 63.0%Crown 33.9°Girdle: STK-THKPavilion 37.6°Culet: NoneDepth 67.6%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $6,231 AUD|Low: $6,210 AUD|High: $25,643 AUD|Avg: $13,348 AUD|-0.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 30, 2026
Retailer 1$6,231 AUD
Retailer 3$7,119 AUD
Retailer 9$7,458 AUD
Retailer 4$9,683 AUD
Retailer 10$11,537 AUD
Retailer 6$12,012 AUD
Retailer 7$15,525 AUD
Retailer 5$15,873 AUD
Retailer 8$16,340 AUD
Retailer 11$18,779 AUD
Retailer 2$25,643 AUD

39 data points across 11 retailers

16 retailers$6,231 AUD to $26,642 AUD

A
Cheapest Retailer
-
$6,231 AUD
£3,446 GBP
A
Retailer 2
-
$7,119 AUD
$5,001 USD
View
A
Retailer 3
-
$7,201 AUD
$5,058 USD
View
Final sale: no returns
Retailer 4
-
$7,458 AUD
$5,239 USD
View
Price last confirmed 14 days ago
A
Retailer 5
-
$7,517 AUD
$5,280 USD
View
A
Retailer 6
-
$8,925 AUD
$6,269 USD
View
A
Retailer 7
-
$9,683 AUD
£5,355 GBP
View
A
Retailer 8
-
$10,522 AUD
£5,820 GBP
View
B+
Retailer 9
-
$11,537 AUD
$8,104 USD
View
B+
Retailer 10
-
$12,012 AUD
€8,036 EUR
View
B+
Retailer 11
-
$15,525 AUD
£8,587 GBP
View
B+
Retailer 12
-
$15,873 AUD
ZAR 180,133 ZAR
View
Retailer 13
-
$16,340 AUD
View
Price last confirmed 8 days ago
B+
Retailer 14
-
$18,779 AUD
$13,191 USD
View
B
Retailer 15
-
$25,643 AUD
SGD 24,342 SGD
View
Most Expensive
B
Taylor and Hart
R8JQKCD · Oct 30
$26,642 AUD
$18,715 USD
View
15 more retailers have this diamond
Prices start from $6,231 AUDSave up to $20,411 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
4.05ct Cushion
$6,231 AUD