Old Harry is made from chalk ! Hope this helped :)
Chalk
He was 11 when he went to Hogwarts
12 and 13 years old
Harry Potter didn't make the Philosopher's (Sorcerer's) Stone. Nicholas Flamel did.
Hard rock, an example of soft rock is Barton-on-sea.
The reason why OHR (Old Harry Rocks) are called so, is because they were named after a famous pirate, Harry Paye, known as "Old Harry." A different legend claims that Old Harry is a euphemism for the devil (Satan).
it was once a cliff and eventually bits got eroded and made old harry n his wife.
Old Harry is a rock, it cannot be married.
harry rednapp is 86 years old
Ron is 15 in the book he was made a perfect with Hermione
Harry is 16 :]
Tiny microscopic organisms have made this rock over billions and billions of years