Your spell will go horribly wrong letting the most vile of evil spirits loose to corrupt the innocent and provoke the sinners on earth
....You do know that a quartz crystal IS a stone, right?
It looks pretty on a necklace and it is good for throwing at people
Haven't heard of the quartz crystal in specifics. However i have heard that granite is supposed to have a influence on paranormal or religious activity. Most granites are composed of a tremendous quantity of quartz. Also i have heard of quartz crystals used to focal point energies.
Most spells safely can be slightly adjusted, I say slightly... the difference between a crystal and a stone is that crystals are there to store and vibrate energy. A stone is a stone.. it won't work as good to say the least. So in this case I think you need to hunt down a quartz crystal. And remember if crystals are broken or have allot of cracks.. they are bad news. They either are not useful because its doesn't work well or worse.. it might be cracked to due to carying bad energy. I do own a few cracked crystals and well I don't use them for anything really.. they are not good news.