The stone of Pisces should be bright and light blue mostly. This sign, ruled by Neptune, is sensitive to the influence of amethyst and aquamarine, given the actual stones of the fish. These gems protect individuals from the negative aspects and make it more strong and full of energy. In particular, the Amethyst offers several benefits, such as the growth of self-esteem, courage, determination and self-control, as well as an aid to memory. The Aquamarine is used instead to matters of the heart, worn as a pendant or set in a ring, free thoughts and feelings accordingly, helping us in love.