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Cushion|Lab Grown|IGI

1.61ct D SI2 Cushion Lab Grown Diamond

ID • D/SI2 • IGI LG528241050

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG528241050

Diamond specifications and retailer prices

From $354 AUD
As of November 7, 2026
Save $1,495 AUD (81%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $1,848 AUD at Brilliant Earth · As of November 6, 2026
View at Brilliant Earth

About this 1.61ct lab-grown cushion diamond

This 1.61ct lab-grown cushion sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG528241050 or 528241050. Listed at 12 retailers as of November 6, 2026, with prices from $354 to $1,848, a $1,495 spread on the same certified stone. Brilliant Earth lists it at $1,848. 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

1.61
Carat
D
Colour
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.3°
Pavilion angle37.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG528241050
Dimensions6.67 × 6.53 × 4.56 mm
L/W Ratio1.02
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
6.67 mm6.53 mm1.61 ctD / SI2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG528241050
Side View
Table 60.5%Crown 37.3°Girdle: MED-THKPavilion 37.6°Culet: NoneDepth 69.8%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 7
Current: $1,848 AUD|Low: $354 AUD|High: $2,489 AUD|Avg: $1,089 AUD|-25.7%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 7, 2026
Retailer 3$354 AUD
Retailer 6$595 AUD
Retailer 8$617 AUD
Retailer 5$639 AUD
Retailer 9$734 AUD
Retailer 2$811 AUD
Retailer 7$1,354 AUD
Retailer 4$1,643 AUD
Brilliant Earth$1,848 AUD

44 data points across 9 retailers

12 retailers$354 AUD to $1,848 AUD

A
Cheapest Retailer
-
$354 AUD
A
Retailer 2
-
$390 AUD
View
A
Retailer 3
-
$595 AUD
View
B+
Retailer 4
-
$617 AUD
View
A
Retailer 5
-
$639 AUD
View
A
Retailer 6
-
$696 AUD
View
A
Retailer 7
-
$734 AUD
View
A
Retailer 8
-
$811 AUD
View
B+
Retailer 9
-
$1,150 AUD
View
Retailer 10
-
$1,354 AUD
View
Price last confirmed 17 days ago
B
Retailer 11
-
$1,643 AUD
View
Most Expensive
B
Brilliant Earth
19056363A · Nov 6
$1,848 AUD
$1,270 USD
View
11 more retailers have this diamond
Prices start from $354 AUDSave up to $1,495 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
1.61ct Cushion
$354 AUD