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Cushion|Natural|GIA

0.50ct E SI1 Cushion Natural Diamond

EX • E/SI1 • GIA 2556404837

Certificate GIA 2556404837

Diamond specifications and retailer prices

From $379 USD
As of November 6, 2026
Save $142 USD (27%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $521 USD at Blue Nile · As of November 5, 2026
View at Blue Nile

About this 0.5ct natural cushion diamond

This 0.5ct natural cushion sits in the half to three-quarter 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 2556404837. Listed at 4 retailers as of November 5, 2026, with prices from $379 to $521, a $142 spread on the same certified stone. Blue Nile lists it at $521. 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

0.50
Carat
E
Color
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 2556404837
Dimensions4.42 × 4.39 × 2.96 mm
L/W Ratio1.01
Culet sizeNone
Key to symbols
Crystal
Top View
4.42 mm4.39 mm0.50 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 2556404837
Side View
Table 65.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 67.3%

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: $521 USD|Low: $339 USD|High: $551 USD|Avg: $442 USD|-5.4%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
November 6, 2026
Retailer 4$379 USD
Retailer 3$394 USD
Retailer 2$486 USD
Blue Nile$521 USD

42 data points across 4 retailers

4 retailers$379 USD to $521 USD

A
Cheapest Retailer
-
$379 USD
A
Retailer 2
-
$394 USD
View
Final sale: no returns
A
Retailer 3
-
$486 USD
View
Most Expensive
A
Blue Nile
29285636 · Nov 5
$521 USD
View
3 more retailers have this diamond
Prices start from $379 USDSave up to $142 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
0.50ct Cushion
$379 USD