Mortared Stone Around Mailbox

Now that the basic setup is done for the mailbox, its time I started to think about how to mortar stone around the mailbox. I found this one site that does a good job of giving a quick overview for using and not using mortar. I think I want to do a stacked stone look. Not sure if I'll use the prefab stuff I've seen at the Depot or go with o' natural. Probably the latter.