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Cushion|Natural|GIA

0.40ct J SI1 Cushion Natural Diamond

EX • J/SI1 • GIA 2557428722

Certificate GIA 2557428722

Diamond specifications and retailer prices

From $334 AUD
₹22,316 INR
As of November 1, 2026
Save $726 AUD (69%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $1,059 AUD at MOH London · As of November 1, 2026
View at MOH London

About this 0.4ct natural cushion diamond

This 0.4ct natural cushion sits in the sub-half-carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2557428722. Listed at 16 retailers as of November 1, 2026, with prices from $334 to $1,059, a $726 spread on the same certified stone. MOH London lists it at $1,059. 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

0.40
Carat
J
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 2557428722
Dimensions5.32 × 3.59 × 2.46 mm
L/W Ratio1.48
Top View
5.32 mm3.59 mm0.40 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2557428722
Side View
Table 68.0%CrownGirdle: MED-ETKPavilionCulet: NoneDepth 68.7%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $1,059 AUD|Low: $334 AUD|High: $1,139 AUD|Avg: $654 AUD|-7.0%
MOH London
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
Retailer 15
November 2, 2026
Retailer 9$334 AUD
Retailer 6$401 AUD
Retailer 12$427 AUD
Retailer 5$494 AUD
Retailer 4$497 AUD
Retailer 13$569 AUD
Retailer 14$584 AUD
Retailer 8$590 AUD
Retailer 7$608 AUD
Retailer 15$626 AUD
Retailer 3$645 AUD
Retailer 11$711 AUD
Retailer 10$859 AUD
Retailer 2$928 AUD
MOH London$1,059 AUD

24 data points across 15 retailers

16 retailers$334 AUD to $1,059 AUD

A
Cheapest Retailer
-
$334 AUD
₹22,316 INR
A
Retailer 2
-
$401 AUD
HK$2,200 HKD
View
A
Retailer 3
-
$427 AUD
$300 USD
View
A
Retailer 4
-
$494 AUD
$347 USD
View
A
Retailer 5
-
$497 AUD
SGD 472 SGD
View
A
Retailer 6
-
$569 AUD
$400 USD
View
A
Retailer 7
-
$584 AUD
$410 USD
View
A
Retailer 8
-
$590 AUD
£327 GBP
View
Retailer 9
-
$608 AUD
$427 USD
View
Price last confirmed 8 days ago
B+
Retailer 10
-
$626 AUD
$440 USD
View
B+
Retailer 11
-
$645 AUD
$453 USD
View
B+
Retailer 12
-
$711 AUD
ZAR 8,071 ZAR
View
Retailer 13
-
$782 AUD
View
Price last confirmed 29 days ago
B+
Retailer 14
-
$859 AUD
€575 EUR
View
B
Retailer 15
-
$928 AUD
£514 GBP
View
Most Expensive
B
MOH London
DBDC5FBD7 · Nov 1
$1,059 AUD
£586 GBP
View
15 more retailers have this diamond
Prices start from $334 AUDSave up to $726 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
0.40ct Cushion
$334 AUD