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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 $465 USD
As of October 29, 2026
Save $4,675 USD (91%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $5,140 USD at Brilliant Earth · As of October 28, 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 28, 2026, with prices from $465 to $5,140, a $4,675 spread on the same certified stone. Brilliant Earth lists it at $5,140. 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
Color
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

How it works →
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 29
Current: $5,140 USD|Low: $249 USD|High: $5,300 USD|Avg: $1,352 USD
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 29, 2026
Retailer 12$465 USD
Retailer 7$515 USD
Retailer 4$563 USD
Retailer 10$780 USD
Retailer 9$788 USD
Retailer 2$845 USD
Retailer 6$902 USD
Retailer 5$1,640 USD
Retailer 3$1,689 USD
Retailer 11$1,756 USD
Retailer 13$1,880 USD
Retailer 8$1,894 USD
Brilliant Earth$5,140 USD

37 data points across 13 retailers

13 retailers$465 USD to $5,140 USD

A
Cheapest Retailer
-
$465 USD
Final sale: no returns
A
Retailer 2
-
$515 USD
View
A
Retailer 3
-
$563 USD
HK$4,400 HKD
View
A
Retailer 4
-
$780 USD
View
B+
Retailer 5
-
$788 USD
View
A
Retailer 6
-
$845 USD
£665 GBP
View
A
Retailer 7
-
$902 USD
€859 EUR
View
B+
Retailer 8
-
$1,640 USD
SGD 2,216 SGD
View
B+
Retailer 9
-
$1,689 USD
View
B+
Retailer 10
-
$1,756 USD
View
B+
Retailer 11
-
$1,880 USD
View
B+
Retailer 12
-
$1,894 USD
£1,491 GBP
View
Most Expensive
B
Brilliant Earth
16422264A · Oct 28
$5,140 USD
View
12 more retailers have this diamond
Prices start from $465 USDSave up to $4,675 USD

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
$465 USD