Sounds like a lovely piece. If you would like to give it a added boost, ask the spirit of/deity of the moon that you are familiar with to bless it, instead of merely utilizing the moon itself. Then you can continue the ritual with your own protection. Don't forget, the moonstone itself has its own spirit/energy.
Moonstone is not a good stone for those who are exceedingly intuitive or "open" spiritually and not in full control of their gifts. It tends to amplify them, and can make them go wild.
It is good for those who are artistic and analytical and wish to enhance their creative side and learn to accept and manage their emotions.