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Cushion|Lab Grown|IGI

3.28ct D SI1 Cushion Lab Grown Diamond

ID • D/SI1 • IGI LG544280736

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG544280736

Diamond specifications and retailer prices

From $662 AUD
$465 USD
As of October 29, 2026
Save $4,463 AUD (87%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $5,125 AUD at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 3.28ct lab-grown cushion diamond

This 3.28ct lab-grown cushion sits in the three to five carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG544280736 or 544280736. Listed at 13 retailers as of October 29, 2026, with prices from $662 to $5,125, a $4,463 spread on the same certified stone. Brilliant Earth lists it at $5,125. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

3.28
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.3°
Pavilion angle37.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG544280736
Dimensions8.62 × 8.35 × 5.43 mm
L/W Ratio1.03
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
8.62 mm8.35 mm3.28 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG544280736
Side View
Table 65.0%Crown 36.3°Girdle: MED-VTKPavilion 37.3°Culet: NoneDepth 65.0%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 29
Current: $5,125 AUD|Low: $354 AUD|High: $7,545 AUD|Avg: $1,935 AUD|-30.0%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 30, 2026
Retailer 12$662 AUD
Retailer 8$733 AUD
Retailer 4$802 AUD
Retailer 10$1,110 AUD
Retailer 2$1,157 AUD
Retailer 6$1,206 AUD
Retailer 7$1,284 AUD
Retailer 5$2,334 AUD
Retailer 3$2,405 AUD
Retailer 11$2,500 AUD
Retailer 13$2,677 AUD
Retailer 9$2,696 AUD
Brilliant Earth$5,125 AUD

37 data points across 13 retailers

13 retailers$662 AUD to $5,125 AUD

A
Cheapest Retailer
-
$662 AUD
$465 USD
Final sale: no returns
A
Retailer 2
-
$733 AUD
$515 USD
View
A
Retailer 3
-
$802 AUD
HK$4,400 HKD
View
A
Retailer 4
-
$1,110 AUD
$780 USD
View
B+
Retailer 5
-
$1,157 AUD
$813 USD
View
A
Retailer 6
-
$1,206 AUD
£667 GBP
View
A
Retailer 7
-
$1,284 AUD
€859 EUR
View
B+
Retailer 8
-
$2,334 AUD
SGD 2,216 SGD
View
B+
Retailer 9
-
$2,405 AUD
$1,689 USD
View
B+
Retailer 10
-
$2,500 AUD
$1,756 USD
View
B+
Retailer 11
-
$2,677 AUD
$1,880 USD
View
B+
Retailer 12
-
$2,696 AUD
£1,491 GBP
View
Most Expensive
B
Brilliant Earth
16422264A · Oct 30
$5,125 AUD
$3,600 USD
View
12 more retailers have this diamond
Prices start from $662 AUDSave up to $4,463 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
3.28ct Cushion
$662 AUD