I was watching Aladdin the other day with my 5 year old cousin, a movie i had not seen in a while but defiantly one of my favourite childhood movies, as i watched it i must say it was honestly one of the best films i had watched in a while and made me feel quite happy.
The saying in the movie "diamond in the rough" also left me interested.

DIAMOND IN THE ROUGH:
"Someone who is good hearted but lacking social graces and respect for the law, this term is often used to describe people on the edge of the criminal fraternity even though they may not commit serious crimes themselves, they probably know people who do"
"Someone (or something) that has hidden exceptional characteristics and/or future potential, but currently lack the final touches, that would make them (or it) truly stand out in the crowd"

This phrase is metaphorical and relates to the fact that naturally occurring diamond are quite ordinary at first glance, and their true beauty as jewels is only realised through the cutting and polishing process, especially those who have the potential to become high quality jewels it is more commonly expressed as "Rough Diamond".