Power stone bracelets (14cm and up). The stones are large, with a rare 14mm diameter. Frosted Onyx Onyx is famous as a stone to ward off evil and has been treasured since ancient times. Originally, agate (carnelian) with black and white stripes was called onyx, but nowadays, black agate is generally called onyx. Meaning/Effects: Success, warding off evil thoughts, perseverance Amethyst (Purple Crystal) Amethyst, the birthstone for February, is a popular power stone known as the "stone of love's protection." The name amethyst comes from "Amethyst," a maiden who served the "moon goddess" in Greek mythology. In Europe, it has been said since ancient times that it has the power to "attract a wonderful lover" and "cool down excessive passion." Meaning/Effects: Sincerity, nobility, harmony, healing, mental stability, problem-solving, family harmony