Agate can be the best crystal for Gemini. That can bring harmony and balance to your home. Also, if you are surrounded by negative powers, you can consider using this stone.
One of the best Gemini crystals is Alexandrite. In fact, Alexandrite is the birthstone for Geminis. Alexandrite attracts a heavy dose of luck for you and is a crystal of good omen.
Serpentine is a manifestation stone that can help you to achieve all the dreams of your life. Also, it can attract prosperity into your life. It can be the best to deal with financial concerns.