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Cushion|Natural|GIA

0.40ct E SI1 Cushion Natural Diamond

EX • E/SI1 • GIA 2554949490

Certificate GIA 2554949490

Diamond specifications and retailer prices

From $847 AUD
As of November 6, 2026
Save $744 AUD (47%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $1,591 AUD at MOH London · As of November 4, 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 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 2554949490. Listed at 5 retailers as of November 4, 2026, with prices from $847 to $1,591, a $744 spread on the same certified stone. MOH London lists it at $1,591. 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
E
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 2554949490
Dimensions4.11 × 4.03 × 2.81 mm
L/W Ratio1.02
Key to symbols
Feather
Top View
4.11 mm4.03 mm0.40 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 2554949490
Side View
Table 65.0%CrownGirdle: STK-VTKPavilionCuletDepth 69.8%

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 6
Current: $1,591 AUD|Low: $803 AUD|High: $1,752 AUD|Avg: $1,104 AUD|-9.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 6, 2026
Retailer 3$847 AUD
Retailer 4$945 AUD
Retailer 2$1,033 AUD
Retailer 5$1,093 AUD
MOH London$1,591 AUD

46 data points across 5 retailers

5 retailers$847 AUD to $1,591 AUD

A
Cheapest Retailer
-
$847 AUD
B+
Retailer 2
-
$945 AUD
View
B+
Retailer 3
-
$1,033 AUD
View
Retailer 4
-
$1,093 AUD
View
Price last confirmed 33 days ago
Most Expensive
B
MOH London
978F7D1E5 · Nov 4
$1,591 AUD
£861 GBP
View
4 more retailers have this diamond
Prices start from $847 AUDSave up to $744 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
$847 AUD