How to differentiate between normal tweet and re-tweet?


#1

For a re-tweeted tweet i have favorited through https://api.twitter.com/1.1/favorites/create.json?id=xxxxxx(Executed successfully).But after refreshing the page
in the tweet information the key favourited is still set to false.So,i am not able to differentiate favorited and not favorited tweets.Can anybody have idea on this issue?