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Cushion|Lab Grown|IGI

4.28ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG846664135

Shape and cutting style on the report: Round cornered rectangular modified brilliant

Certificate IGI LG846664135

Diamond specifications and retailer prices

From $7,396 AUD
$5,195 USD
As of October 31, 2026
Save $30,613 AUD (81%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $38,009 AUD at With Clarity · As of October 31, 2026
View at With Clarity

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 top-tier cut grade and certified by IGI LG846664135 or 846664135. Listed at 5 retailers as of October 31, 2026, with prices from $7,396 to $38,009, a $30,613 spread on the same certified stone. With Clarity lists it at $38,009. 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

4.28
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle31.7°
Pavilion angle43.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG846664135
Dimensions10.51 × 7.58 × 5.17 mm
L/W Ratio1.39
Girdle conditionFaceted
Culet sizeLarge
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
10.51 mm7.58 mm4.28 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG846664135
Side View
Table 59.0%Crown 31.7°Girdle: MED-STKPavilion 43.4°Culet: LargeDepth 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 31
Current: $7,396 AUD|Low: $7,396 AUD|High: $42,233 AUD|Avg: $22,765 AUD
Retailer 1
Retailer 2
Retailer 3
Retailer 4
With Clarity
October 31, 2026
Retailer 1$7,396 AUD
Retailer 2$9,430 AUD
Retailer 3$9,548 AUD
Retailer 4$21,539 AUD
With Clarity$38,009 AUD

4 data points across 5 retailers

5 retailers$7,396 AUD to $38,009 AUD

A
Cheapest Retailer
-
$7,396 AUD
$5,195 USD
A
Retailer 2
-
$9,430 AUD
$6,624 USD
View
A
Retailer 3
-
$9,548 AUD
$6,707 USD
View
B+
Retailer 4
-
$21,539 AUD
$15,130 USD
View
Most Expensive
B
With Clarity
846664135 · Oct 31
$38,009 AUD
$26,699 USD
View
4 more retailers have this diamond
Prices start from $7,396 AUDSave up to $30,613 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
$7,396 AUD