Features: This beautiful Amethyst is Unheated / Untreated pure Vedic Astrological natural gemstone. Amethyst stone is believed to protect and calm the mind of its wearer. Amethyst increases the power to concentrate and hence is useful for the people engaged in research work like scientists and mathematicians representing the two Chakras of one?s spiritual body. Wear With :- Silver,Gold, Panchdhatu & Ashtadhatu Metal (or as per Astrologer) The Second substitute Gemstone that gives powerful results as an Uparatna for Blue Sapphire is the Amethyst. Amethyst is found in any shade of Purple to violet.