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Cushion|Lab Grown|IGI

2.50ct E SI1 Cushion Lab Grown Diamond

ID • E/SI1 • IGI LG613392731

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG613392731

Diamond specifications and retailer prices

From $424 USD
As of October 30, 2026
Save $1,986 USD (82%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $2,410 USD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 2.5ct lab-grown cushion diamond

This 2.5ct lab-grown cushion sits in the two to three carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG613392731 or 613392731. Listed at 11 retailers as of October 29, 2026, with prices from $424 to $2,410, a $1,986 spread on the same certified stone. Brilliant Earth lists it at $2,410. 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

2.50
Carat
E
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.7°
Pavilion angle40.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG613392731
Dimensions8.71 × 7.38 × 5.20 mm
L/W Ratio1.18
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
8.71 mm7.38 mm2.50 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG613392731
Side View
Table 63.0%Crown 33.7°Girdle: MED-STKPavilion 40.1°Culet: NoneDepth 70.5%

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 30
Current: $2,410 USD|Low: $424 USD|High: $2,480 USD|Avg: $1,024 USD|-2.8%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 30, 2026
Retailer 9$424 USD
Retailer 6$470 USD
Retailer 5$600 USD
Retailer 7$748 USD
Retailer 3$758 USD
Retailer 8$829 USD
Retailer 2$850 USD
Retailer 4$1,845 USD
Brilliant Earth$2,410 USD

42 data points across 9 retailers

11 retailers$424 USD to $2,410 USD

A
Cheapest Retailer
-
$424 USD
Final sale: no returns
A
Retailer 2
-
$470 USD
View
A
Retailer 3
-
$600 USD
View
B+
Retailer 4
-
$748 USD
View
A
Retailer 5
-
$758 USD
€722 EUR
View
B+
Retailer 6
-
$812 USD
View
B+
Retailer 7
-
$829 USD
View
B+
Retailer 8
-
$850 USD
£669 GBP
View
B
Retailer 9
-
$1,549 USD
View
B
Retailer 10
-
$1,845 USD
£1,453 GBP
View
Most Expensive
B
Brilliant Earth
8815295A · Oct 29
$2,410 USD
View
10 more retailers have this diamond
Prices start from $424 USDSave up to $1,986 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
2.50ct Cushion
$424 USD