sand?

[cdaddi]

is there a difference between jointing sand and sharp sand? if so what is it?

[buildersmate]

Oh yes, and they are not interchangeable. It relates to the size and shape (jagged or not) of the individual sand particles. There's a good explanation here.
http://www.pavingexpert.com/pointing.htm#sand
(scroll down the page to dry sand jointing)