Cushion|Natural|GIA

0.40ct E SI1 Cushion Natural Diamond

EX • E/SI1 • GIA 6555182513

Certificate GIA 6555182513

Diamond specifications and retailer prices

From $428 USD
As of November 6, 2026
Save $933 USD (69%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $1,361 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 6555182513. Listed at 10 retailers as of November 4, 2026, with prices from $428 to $1,361, a $933 spread on the same certified stone. MOH London lists it at $1,361. 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
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6555182513
Dimensions4.14 × 4.08 × 2.82 mm
L/W Ratio1.01
Culet sizeNone
Key to symbols
Cloud
Top View
4.14 mm4.08 mm0.40 ctE / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 6555182513
Side View
Table 63.0%CrownGirdle: THK-XTKPavilionCulet: NoneDepth 69.2%

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: Nov 6
Current: $1,361 USD|Low: $428 USD|High: $1,379 USD|Avg: $844 USD|-1.0%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 2$428 USD
Retailer 4$713 USD
Retailer 6$780 USD
Retailer 7$808 USD
Retailer 3$868 USD
Retailer 8$887 USD
Retailer 5$915 USD
MOH London$1,361 USD

37 data points across 8 retailers

10 retailers$428 USD to $1,361 USD

A
Cheapest Retailer
-
$428 USD
B+
Retailer 2
-
$681 USD
View
B+
Retailer 3
-
$704 USD
View
B+
Retailer 4
-
$713 USD
View
B+
Retailer 5
-
$780 USD
View
B+
Retailer 6
-
$808 USD
View
B+
Retailer 7
-
$868 USD
View
Retailer 8
-
$887 USD
View
Price last confirmed 33 days ago
B+
Retailer 9
-
$915 USD
View
Most Expensive
B
MOH London
238577F87 · Nov 4
$1,361 USD
£1,072 GBP
View
9 more retailers have this diamond
Prices start from $428 USDSave up to $933 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
$428 USD