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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 $267 SGD
As of November 6, 2026
Save $1,130 SGD (81%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $1,397 SGD 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 $267 to $1,397, a $1,130 spread on the same certified stone. Brilliant Earth lists it at $1,397. 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

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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: Nov 6
Current: $1,397 SGD|Low: $267 SGD|High: $1,487 SGD|Avg: $732 SGD|-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$267 SGD
Retailer 8$295 SGD
Retailer 11$397 SGD
Retailer 4$524 SGD
Retailer 2$541 SGD
Retailer 10$588 SGD
Retailer 7$724 SGD
Retailer 6$878 SGD
Retailer 3$1,015 SGD
Retailer 5$1,373 SGD
Brilliant Earth$1,397 SGD

43 data points across 11 retailers

13 retailers$267 SGD to $1,397 SGD

A
Cheapest Retailer
-
$267 SGD
Final sale: no returns
Retailer 2
-
$295 SGD
View
Price last confirmed 12 days ago
B+
Retailer 3
-
$397 SGD
View
A
Retailer 4
-
$524 SGD
View
A
Retailer 5
-
$541 SGD
View
A
Retailer 6
-
$588 SGD
View
B+
Retailer 7
-
$724 SGD
View
B+
Retailer 8
-
$871 SGD
View
Retailer 9
-
$877 SGD
View
Price last confirmed 89 days ago
B+
Retailer 10
-
$878 SGD
View
B
Retailer 11
-
$1,015 SGD
View
B
Retailer 12
-
$1,373 SGD
View
Most Expensive
B
Brilliant Earth
21312327A · Nov 6
$1,397 SGD
$1,090 USD
View
12 more retailers have this diamond
Prices start from $267 SGDSave up to $1,130 SGD

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
$267 SGD