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Cushion|Lab Grown|IGI

1.31ct E SI1 Cushion Lab Grown Diamond

EX • E/SI1 • IGI LG694550465

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI LG694550465

Diamond specifications and retailer prices

From $303 AUD
As of November 6, 2026
Save $1,284 AUD (81%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $1,586 AUD at Brilliant Earth · As of November 6, 2026
View at Brilliant Earth

About this 1.31ct lab-grown cushion diamond

This 1.31ct lab-grown cushion sits in the one-and-a-quarter to one-and-a-half carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG694550465 or 694550465. Listed at 13 retailers as of November 6, 2026, with prices from $303 to $1,586, a $1,284 spread on the same certified stone. Brilliant Earth lists it at $1,586. 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

1.31
Carat
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.9°
Pavilion angle38.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG694550465
Dimensions6.44 × 6.23 × 4.20 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
6.44 mm6.23 mm1.31 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG694550465
Side View
Table 63.0%Crown 38.9°Girdle: MED-STKPavilion 38.8°Culet: NoneDepth 67.4%

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: Nov 6
Current: $1,586 AUD|Low: $303 AUD|High: $1,688 AUD|Avg: $831 AUD|-2.7%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 9$303 AUD
Retailer 8$335 AUD
Retailer 11$451 AUD
Retailer 4$595 AUD
Retailer 2$614 AUD
Retailer 10$668 AUD
Retailer 7$822 AUD
Retailer 6$997 AUD
Retailer 3$1,153 AUD
Retailer 5$1,559 AUD
Brilliant Earth$1,586 AUD

43 data points across 11 retailers

13 retailers$303 AUD to $1,586 AUD

A
Cheapest Retailer
-
$303 AUD
Final sale: no returns
Retailer 2
-
$335 AUD
View
Price last confirmed 12 days ago
B+
Retailer 3
-
$451 AUD
View
A
Retailer 4
-
$595 AUD
View
A
Retailer 5
-
$614 AUD
View
A
Retailer 6
-
$668 AUD
View
B+
Retailer 7
-
$822 AUD
View
B+
Retailer 8
-
$990 AUD
View
Retailer 9
-
$995 AUD
View
Price last confirmed 89 days ago
B+
Retailer 10
-
$997 AUD
View
B
Retailer 11
-
$1,153 AUD
View
B
Retailer 12
-
$1,559 AUD
View
Most Expensive
B
Brilliant Earth
21312327A · Nov 6
$1,586 AUD
$1,090 USD
View
12 more retailers have this diamond
Prices start from $303 AUDSave up to $1,284 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
1.31ct Cushion
$303 AUD