The stone tip on a wooden wand is an old tradition. It enhances the energy by adding more elemental correspondance. It adds a great deal visually- the flash of a brilliant Quartz Crystal is a powerful sight.
Here you will find as many styles as there are in my wooden-tipped category; Any wand can be made with a stone tip.
You may wish to pick a special stone for your particular wand, or you might have a stone yourself. I will gladly accommodate your desires!