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Cushion|Natural|GIA

1.57ct E SI1 Cushion Natural Diamond

EX • E/SI1 • GIA 1

Certificate GIA 1

Diamond specifications and retailer prices

From $13,665 AUD
$9,599 USD
As of October 31, 2026
Save $3,569 AUD (21%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: $17,234 AUD at Blue Nile · As of October 31, 2026
View at Blue Nile

About this 1.57ct natural cushion diamond

This 1.57ct natural 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 stated by the retailer rather than the lab and certified by GIA. Listed at 3 retailers as of October 31, 2026, with prices from $13,665 to $17,234, a $3,569 spread on the same certified stone. Blue Nile lists it at $17,234. 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
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 1
Dimensions6.82 × 6.38 × 4.31 mm
L/W Ratio1.07
Top View
6.82 mm6.38 mm1.57 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 1
Side View
Table 58.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 67.5%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: $17,234 AUD|Low: $13,503 AUD|High: $17,234 AUD|Avg: $15,166 AUD
Blue Nile
Retailer 2
Retailer 3
September 23, 2026
Retailer 2$13,665 AUD
Retailer 3$14,843 AUD
Blue Nile$17,234 AUD

3 data points across 3 retailers

3 retailers$13,665 AUD to $17,234 AUD

B+
Cheapest Retailer
-
$13,665 AUD
$9,599 USD
B
Retailer 2
-
$14,843 AUD
$10,426 USD
View
Most Expensive
B
Blue Nile
285145 · Oct 31
$17,234 AUD
$12,106 USD
View
2 more retailers have this diamond
Prices start from $13,665 AUDSave up to $3,569 AUD

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.

B+
1.57ct Cushion
$13,665 AUD