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Cushion|Lab Grown|IGI

2.59ct E SI1 Cushion Lab Grown Diamond

ID • E/SI1 • IGI LG737580697

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG737580697

Diamond specifications and retailer prices

From $579 NZD
$325 USD
As of October 28, 2026
Save $3,784 NZD (87%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $4,362 NZD at Brilliant Earth · As of October 28, 2026
View at Brilliant Earth

About this 2.59ct lab-grown cushion diamond

This 2.59ct 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 LG737580697 or 737580697. Listed at 13 retailers as of October 28, 2026, with prices from $579 to $4,362, a $3,784 spread on the same certified stone. Brilliant Earth lists it at $4,362. 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

2.59
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.8°
Pavilion angle35.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG737580697
Dimensions8.98 × 7.33 × 4.84 mm
L/W Ratio1.23
Girdle conditionFaceted
Culet sizeNone
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.98 mm7.33 mm2.59 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG737580697
Side View
Table 57.0%Crown 33.8°Girdle: STK-VTKPavilion 35.2°Culet: NoneDepth 66.0%

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: Oct 28
Current: $4,362 NZD|Low: $579 NZD|High: $5,146 NZD|Avg: $1,783 NZD|-15.2%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
October 29, 2026
Retailer 11$579 NZD
Retailer 9$806 NZD
Retailer 10$864 NZD
Retailer 14$864 NZD
Retailer 5$872 NZD
Retailer 7$1,038 NZD
Retailer 2$1,129 NZD
Retailer 12$1,180 NZD
Retailer 3$1,478 NZD
Retailer 4$2,145 NZD
Retailer 8$2,580 NZD
Retailer 13$2,636 NZD
Retailer 6$3,151 NZD
Brilliant Earth$4,362 NZD

41 data points across 14 retailers

13 retailers$579 NZD to $4,362 NZD

A
Cheapest Retailer
-
$579 NZD
$325 USD
Final sale: no returns
A
Retailer 2
-
$806 NZD
£357 GBP
View
A
Retailer 3
-
$864 NZD
$485 USD
View
B+
Retailer 4
-
$864 NZD
$485 USD
View
A
Retailer 5
-
$1,038 NZD
€555 EUR
View
A
Retailer 6
-
$1,129 NZD
£499 GBP
View
A
Retailer 7
-
$1,180 NZD
$663 USD
View
B+
Retailer 8
-
$1,478 NZD
$830 USD
View
B+
Retailer 9
-
$2,145 NZD
$1,205 USD
View
B+
Retailer 10
-
$2,580 NZD
£1,141 GBP
View
B
Retailer 11
-
$2,636 NZD
$1,481 USD
View
B
Retailer 12
-
$3,151 NZD
$1,770 USD
View
Price last confirmed 29 days ago
Most Expensive
B
Brilliant Earth
18587734A · Oct 28
$4,362 NZD
$2,450 USD
View
12 more retailers have this diamond
Prices start from $579 NZDSave up to $3,784 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
2.59ct Cushion
$579 NZD