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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 €186 EUR
As of November 6, 2026
Save €790 EUR (81%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: €976 EUR 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 €186 to €976, a €790 spread on the same certified stone. Brilliant Earth lists it at €976. 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: €976 EUR|Low: €186 EUR|High: €1,039 EUR|Avg: €511 EUR|-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€186 EUR
Retailer 8€206 EUR
Retailer 11€278 EUR
Retailer 4€366 EUR
Retailer 2€378 EUR
Retailer 10€411 EUR
Retailer 7€506 EUR
Retailer 6€614 EUR
Retailer 3€709 EUR
Retailer 5€959 EUR
Brilliant Earth€976 EUR

43 data points across 11 retailers

13 retailers€186 EUR to €976 EUR

A
Cheapest Retailer
-
€186 EUR
Final sale: no returns
Retailer 2
-
€206 EUR
View
Price last confirmed 12 days ago
B+
Retailer 3
-
€278 EUR
View
A
Retailer 4
-
€366 EUR
View
A
Retailer 5
-
€378 EUR
View
A
Retailer 6
-
€411 EUR
View
B+
Retailer 7
-
€506 EUR
View
B+
Retailer 8
-
€609 EUR
View
Retailer 9
-
€613 EUR
View
Price last confirmed 89 days ago
B+
Retailer 10
-
€614 EUR
View
B
Retailer 11
-
€709 EUR
View
B
Retailer 12
-
€959 EUR
View
Most Expensive
B
Brilliant Earth
21312327A · Nov 6
€976 EUR
$1,090 USD
View
12 more retailers have this diamond
Prices start from €186 EURSave up to €790 EUR

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
€186 EUR