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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 $752 NZD
$424 USD
As of October 30, 2026
Save $3,524 NZD (82%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $4,276 NZD 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 $752 to $4,276, a $3,524 spread on the same certified stone. Brilliant Earth lists it at $4,276. 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
Colour
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: $4,276 NZD|Low: $752 NZD|High: $4,400 NZD|Avg: $1,816 NZD|-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$752 NZD
Retailer 6$834 NZD
Retailer 5$1,065 NZD
Retailer 7$1,327 NZD
Retailer 3$1,345 NZD
Retailer 8$1,471 NZD
Retailer 2$1,508 NZD
Retailer 4$3,274 NZD
Brilliant Earth$4,276 NZD

41 data points across 9 retailers

11 retailers$752 NZD to $4,276 NZD

A
Cheapest Retailer
-
$752 NZD
$424 USD
Final sale: no returns
A
Retailer 2
-
$834 NZD
$470 USD
View
A
Retailer 3
-
$1,065 NZD
$600 USD
View
B+
Retailer 4
-
$1,327 NZD
$748 USD
View
A
Retailer 5
-
$1,345 NZD
€722 EUR
View
B+
Retailer 6
-
$1,441 NZD
$812 USD
View
B+
Retailer 7
-
$1,471 NZD
$829 USD
View
B+
Retailer 8
-
$1,508 NZD
£669 GBP
View
B
Retailer 9
-
$2,748 NZD
$1,549 USD
View
B
Retailer 10
-
$3,274 NZD
£1,453 GBP
View
Most Expensive
B
Brilliant Earth
8815295A · Oct 29
$4,276 NZD
$2,410 USD
View
10 more retailers have this diamond
Prices start from $752 NZDSave up to $3,524 NZD

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
$752 NZD