Hi John... Several years ago I suffered so much with dental problems...I was in agony month after month with tooth abscesses.... antibiotics helped...and then I'd get another etc.. I started to carry flourite with my all day, and sleep with it at night....the results were astounding. Otherwise it's just the sheer beauty of this, and to my mind , any other gemstone... I would be hard pressed to choose a favourite ...( Although we all know tanzanite for me is super lovely)....