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Cushion|Lab Grown|IGI

4.28ct D FL Cushion Lab Grown Diamond

EX • D/FL • IGI LG754594736

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG754594736

Diamond specifications and retailer prices

From $6,857 AUD
$4,817 USD
As of October 30, 2026
Save $31,521 AUD (82%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $38,379 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 LG754594736 or 754594736. Listed at 14 retailers as of October 30, 2026, with prices from $6,857 to $38,379, a $31,521 spread on the same certified stone. With Clarity lists it at $38,379. 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
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.4°
Pavilion angle37.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG754594736
Dimensions10.72 × 8.90 × 5.80 mm
L/W Ratio1.20
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
10.72 mm8.90 mm4.28 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG754594736
Side View
Table 61.0%Crown 34.4°Girdle: STK-THKPavilion 37.1°Culet: NoneDepth 65.2%

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: $9,027 AUD|Low: $6,857 AUD|High: $48,039 AUD|Avg: $18,832 AUD|-5.4%
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
With Clarity
October 31, 2026
Retailer 6$6,857 AUD
Retailer 1$9,027 AUD
Retailer 13$9,075 AUD
Retailer 10$9,419 AUD
Retailer 2$11,939 AUD
Retailer 5$12,257 AUD
Retailer 7$13,591 AUD
Retailer 12$15,460 AUD
Retailer 3$16,127 AUD
Retailer 8$18,877 AUD
Retailer 4$20,911 AUD
Retailer 11$25,913 AUD
Retailer 9$26,281 AUD
With Clarity$38,379 AUD

36 data points across 14 retailers

14 retailers$6,857 AUD to $38,379 AUD

A
Cheapest Retailer
-
$6,857 AUD
$4,817 USD
A
Retailer 2
-
$9,027 AUD
$6,341 USD
View
A
Retailer 3
-
$9,075 AUD
HK$49,800 HKD
View
A
Retailer 4
-
$9,419 AUD
£5,210 GBP
View
A
Retailer 5
-
$11,939 AUD
€7,987 EUR
View
B+
Retailer 6
-
$12,257 AUD
$8,610 USD
View
B+
Retailer 7
-
$13,591 AUD
$9,547 USD
View
B+
Retailer 8
-
$15,460 AUD
ZAR 175,446 ZAR
View
B+
Retailer 9
-
$16,127 AUD
£8,920 GBP
View
B+
Retailer 10
-
$18,877 AUD
$13,260 USD
View
B+
Retailer 11
-
$20,911 AUD
$14,689 USD
View
B+
Retailer 12
-
$25,913 AUD
$18,203 USD
View
B+
Retailer 13
-
$26,281 AUD
SGD 24,947 SGD
View
Most Expensive
B
With Clarity
754594736 · Oct 31
$38,379 AUD
$26,959 USD
View
13 more retailers have this diamond
Prices start from $6,857 AUDSave up to $31,521 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
$6,857 AUD