Amethyst is another favorite stone of mine. I have many. Some on necklaces and others stones I keep around my house, usually in the bedroom. They are supposed to reduce bad habits such as addictions and obsessive compulsive disorders. They are said to bring the wearer calming energy, protection from negativity, reduced headaches and good luck. While I was window shopping I saw this one.
This is expensive, but it is beautiful to me.