If you go on the pandora.net website (their official website) you can search authorized online retailers. Rue La La is listed. They are real charms :)

They're legit, the only thing I would caution with Pandora on Rue La La is that they don't always have essence charms set into their own little boutique which would help a lot. The Essence collection only works for essence collection and thus is a buyer beware issue with Pandora. They're helpful with getting these returned especially if you're clear that you've never purchased Pandora before (though they did finally start to note on the site that they're not compatible)

Furthermore, I can NOT wear Silver Plated anything.
I will turn it Green.
I have Pandora Charms that I purchased via a Pandora Retailer, and they are NOT Plated.
If you are buying Pandora and it is plated... You have FAKE Pandora!
The Charms are solid Sterling Silver. Hence, 925. That is the Worldwide Symbol for solid Sterling Silver.
ALE stands for the person whom invented Pandora Jewelry!