The butterfly is associated by many cultures as the human soul. In the Christian religion, it is seen as a symbol of resurrection. And in that resurrection, it is a representation of endurance, change, hope, and life.
As for the stone, the turquoise stone is a sea-green blue color that is representative of wisdom, tranquility, protection, good fortune, and hope. It is believed by many individuals to carry profound powers of protection; and with this, a symbol of enduring love.