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Cushion|Lab Grown|IGI

1.57ct E SI1 Cushion Lab Grown Diamond

ID • E/SI1

Diamond specifications and retailer prices

From $608 NZD
£270 GBP
As of October 27, 2026
Save $723 NZD (54%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: $1,331 NZD at Diamond Exchange Canada · As of October 27, 2026
View at Diamond Exchange Canada

About this 1.57ct lab-grown cushion diamond

This 1.57ct 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. Listed at 2 retailers as of October 27, 2026, with prices from $608 to $1,331, a $723 spread on the same certified stone. Diamond Exchange Canada lists it at $1,331. 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

1.57
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabIGI
Dimensions8.56 × 5.88 × 0.00 mm
L/W Ratio1.46
Top View
8.56 mm5.88 mm1.57 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI
Side View
Table 62.0%CrownGirdle: MED-STKPavilionCuletDepth 66.8%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 27
Current: $1,331 NZD|Low: $606 NZD|High: $1,399 NZD|Avg: $980 NZD|-4.9%
Diamond Exchange Canada
Retailer 2
October 27, 2026
Retailer 2$608 NZD
Diamond Exchange Canada$1,331 NZD

10 data points across 2 retailers

2 retailers$608 NZD to $1,331 NZD

A
Cheapest Retailer
-
$608 NZD
£270 GBP
Most Expensive
B
Diamond Exchange Canada
1768920957 · Oct 27
$1,331 NZD
CA$1,042 CAD
View
1 more retailer has this diamond
Prices start from $608 NZDSave up to $723 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
1.57ct Cushion
$608 NZD