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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 $582 USD
As of November 6, 2026
Save $511 USD (47%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $1,093 USD 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 $582 to $1,093, a $511 spread on the same certified stone. MOH London lists it at $1,093. 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
Color
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: $1,093 USD|Low: $552 USD|High: $1,204 USD|Avg: $758 USD|-9.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 6, 2026
Retailer 3$582 USD
Retailer 4$649 USD
Retailer 2$710 USD
Retailer 5$751 USD
MOH London$1,093 USD

46 data points across 5 retailers

5 retailers$582 USD to $1,093 USD

A
Cheapest Retailer
-
$582 USD
B+
Retailer 2
-
$649 USD
View
B+
Retailer 3
-
$710 USD
View
Retailer 4
-
$751 USD
View
Price last confirmed 33 days ago
Most Expensive
B
MOH London
978F7D1E5 · Nov 4
$1,093 USD
£861 GBP
View
4 more retailers have this diamond
Prices start from $582 USDSave up to $511 USD

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
$582 USD