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Cushion|Natural|GIA

1.40ct E SI2 Cushion Natural Diamond

ID • E/SI2 • GIA 6545517059

Certificate GIA 6545517059

Diamond specifications and retailer prices

From $4,191 AUD
HK$23,000 HKD
As of October 30, 2026
Save $1,826 AUD (30%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $6,018 AUD at Blue Nile · As of October 29, 2026
View at Blue Nile

About this 1.4ct natural cushion diamond

This 1.4ct natural cushion sits in the one-and-a-quarter to one-and-a-half carat band, graded E colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6545517059. Listed at 5 retailers as of October 29, 2026, with prices from $4,191 to $6,018, a $1,826 spread on the same certified stone. Blue Nile lists it at $6,018. 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

1.40
Carat
E
Colour
SI2
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6545517059
Dimensions6.39 × 6.16 × 4.23 mm
L/W Ratio1.04
Top View
6.39 mm6.16 mm1.40 ctE / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6545517059
Side View
Table 65.0%CrownGirdle: Very ThickPavilionCulet: NoneDepth 68.7%

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: $6,018 AUD|Low: $4,191 AUD|High: $6,339 AUD|Avg: $5,521 AUD|-2.7%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 22, 2026
Retailer 2$4,191 AUD
Retailer 4$5,005 AUD
Retailer 5$5,050 AUD
Retailer 3$5,808 AUD
Blue Nile$6,018 AUD
Retailer 6$6,339 AUD

11 data points across 6 retailers

5 retailers$4,191 AUD to $6,018 AUD

A
Cheapest Retailer
-
$4,191 AUD
HK$23,000 HKD
A
Retailer 2
-
$5,005 AUD
SGD 4,751 SGD
View
A
Retailer 3
-
$5,050 AUD
$3,547 USD
View
A
Retailer 4
-
$5,808 AUD
$4,080 USD
View
Most Expensive
A
Blue Nile
28416902 · Oct 29
$6,018 AUD
$4,227 USD
View
4 more retailers have this diamond
Prices start from $4,191 AUDSave up to $1,826 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.

A
1.40ct Cushion
$4,191 AUD