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Cushion|Lab Grown|IGI

4.05ct E FL Cushion Lab Grown Diamond

ID • E/FL • IGI LG784645772

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG784645772

Diamond specifications and retailer prices

From $5,054 AUD
$3,550 USD
As of October 30, 2026
Save $26,166 AUD (84%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $31,220 AUD at Do Amore Diamonds · As of October 31, 2026
View at Do Amore Diamonds

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 LG784645772 or 784645772. Listed at 10 retailers as of October 30, 2026, with prices from $5,054 to $31,220, a $26,166 spread on the same certified stone. Do Amore Diamonds lists it at $31,220. 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
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.7°
Pavilion angle35.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG784645772
Dimensions10.42 × 8.40 × 5.73 mm
L/W Ratio1.24
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
10.42 mm8.40 mm4.05 ctE / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG784645772
Side View
Table 59.0%Crown 34.7°Girdle: MED-THKPavilion 35.7°Culet: NoneDepth 68.2%

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: $31,220 AUD|Low: $5,054 AUD|High: $39,605 AUD|Avg: $12,377 AUD|-21.2%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 30, 2026
Retailer 2$5,054 AUD
Retailer 6$5,488 AUD
Retailer 4$6,490 AUD
Retailer 10$6,845 AUD
Retailer 8$8,234 AUD
Retailer 5$9,945 AUD
Retailer 9$11,047 AUD
Retailer 7$12,511 AUD
Retailer 3$15,233 AUD
Do Amore Diamonds$31,220 AUD

30 data points across 10 retailers

10 retailers$5,054 AUD to $31,220 AUD

A
Cheapest Retailer
-
$5,054 AUD
$3,550 USD
A
Retailer 2
-
$5,488 AUD
$3,855 USD
View
A
Retailer 3
-
$6,490 AUD
$4,559 USD
View
A
Retailer 4
-
$6,845 AUD
$4,808 USD
View
Final sale: no returns
A
Retailer 5
-
$8,234 AUD
$5,784 USD
View
A
Retailer 6
-
$9,945 AUD
€6,653 EUR
View
Retailer 7
-
$11,047 AUD
$7,760 USD
View
Price last confirmed 10 days ago
B+
Retailer 8
-
$12,511 AUD
£6,920 GBP
View
B+
Retailer 9
-
$15,233 AUD
$10,700 USD
View
Most Expensive
B
Do Amore Diamonds
27-D855F980A · Oct 31
$31,220 AUD
$21,930 USD
View
9 more retailers have this diamond
Prices start from $5,054 AUDSave up to $26,166 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
$5,054 AUD