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Cushion|Lab Grown|IGI

4.28ct D FL Cushion Lab Grown Diamond

VG • D/FL • IGI LG804665090

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI LG804665090

Diamond specifications and retailer prices

From $5,807 AUD
$4,079 USD
As of November 1, 2026
Save $30,950 AUD (84%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $36,757 AUD at Do Amore Diamonds · As of October 31, 2026
View at Do Amore Diamonds

About this 4.28ct lab-grown cushion diamond

This 4.28ct lab-grown cushion sits in the three to five carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a very-good cut grade and certified by IGI LG804665090 or 804665090. Listed at 10 retailers as of October 31, 2026, with prices from $5,807 to $36,757, a $30,950 spread on the same certified stone. Do Amore Diamonds lists it at $36,757. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

4.28
Carat
D
Colour
FL
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.8°
Pavilion angle37.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG804665090
Dimensions9.41 × 9.32 × 6.23 mm
L/W Ratio1.01
Girdle conditionFaceted
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
9.41 mm9.32 mm4.28 ctD / FL
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG804665090
Side View
Table 64.0%Crown 38.8°Girdle: STK-THKPavilion 37.1°Culet: NoneDepth 66.8%

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: Nov 1
Current: $36,757 AUD|Low: $5,807 AUD|High: $47,107 AUD|Avg: $15,856 AUD|-22.0%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 31, 2026
Retailer 3$5,807 AUD
Retailer 6$6,285 AUD
Retailer 5$6,815 AUD
Retailer 9$8,134 AUD
Retailer 8$9,673 AUD
Retailer 2$11,740 AUD
Retailer 10$12,196 AUD
Retailer 7$14,243 AUD
Retailer 4$18,877 AUD
Do Amore Diamonds$36,757 AUD

27 data points across 10 retailers

10 retailers$5,807 AUD to $36,757 AUD

A
Cheapest Retailer
-
$5,807 AUD
$4,079 USD
A
Retailer 2
-
$6,285 AUD
$4,415 USD
View
A
Retailer 3
-
$6,815 AUD
$4,787 USD
View
A
Retailer 4
-
$8,134 AUD
$5,714 USD
View
Final sale: no returns
A
Retailer 5
-
$9,673 AUD
$6,795 USD
View
A
Retailer 6
-
$11,740 AUD
€7,854 EUR
View
Retailer 7
-
$12,196 AUD
$8,567 USD
View
Price last confirmed 83 days ago
B+
Retailer 8
-
$14,243 AUD
£7,878 GBP
View
B+
Retailer 9
-
$18,877 AUD
$13,260 USD
View
Most Expensive
B
Do Amore Diamonds
27-29F68735D · Oct 31
$36,757 AUD
$25,820 USD
View
9 more retailers have this diamond
Prices start from $5,807 AUDSave up to $30,950 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
4.28ct Cushion
$5,807 AUD