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Cushion|Lab Grown|IGI

1.59ct E SI1 Cushion Lab Grown Diamond

EX • E/SI1 • IGI LG455010380

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI LG455010380

Diamond specifications and retailer prices

From $714 NZD
$401 USD
As of October 29, 2026
Save $3,541 NZD (83%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $4,255 NZD at Do Amore Diamonds · As of October 29, 2026
View at Do Amore Diamonds

About this 1.59ct lab-grown cushion diamond

This 1.59ct lab-grown cushion sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG455010380 or 455010380. Listed at 9 retailers as of October 29, 2026, with prices from $714 to $4,255, a $3,541 spread on the same certified stone. Do Amore Diamonds lists it at $4,255. 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

1.59
Carat
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.3°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG455010380
Dimensions6.76 × 6.74 × 4.60 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Chemical Vapor Deposition (CVD) laboratory grown diamond is classified as Type IIa.
Top View
6.76 mm6.74 mm1.59 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG455010380
Side View
Table 60.0%Crown 35.3°Girdle: STK-VTKPavilion 40.8°Culet: NoneDepth 68.2%

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 29
Current: $4,255 NZD|Low: $714 NZD|High: $4,255 NZD|Avg: $1,747 NZD
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 29, 2026
Retailer 4$714 NZD
Retailer 5$985 NZD
Retailer 2$1,158 NZD
Retailer 7$1,583 NZD
Retailer 8$2,129 NZD
Retailer 6$2,400 NZD
Retailer 3$2,641 NZD
Do Amore Diamonds$4,255 NZD

34 data points across 8 retailers

9 retailers$714 NZD to $4,255 NZD

A
Cheapest Retailer
-
$714 NZD
$401 USD
A
Retailer 2
-
$872 NZD
$490 USD
View
B+
Retailer 3
-
$985 NZD
$553 USD
View
B+
Retailer 4
-
$1,158 NZD
£512 GBP
View
B+
Retailer 5
-
$1,583 NZD
$889 USD
View
B
Retailer 6
-
$2,129 NZD
$1,196 USD
View
B
Retailer 7
-
$2,400 NZD
$1,348 USD
View
B
Retailer 8
-
$2,641 NZD
£1,168 GBP
View
Most Expensive
B
Do Amore Diamonds
27-363F4265B · Oct 29
$4,255 NZD
$2,390 USD
View
8 more retailers have this diamond
Prices start from $714 NZDSave up to $3,541 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
1.59ct Cushion
$714 NZD