Amethyst sometime is recommended as a substitute stone of “Blue Sapphire” to reduce the bad effects of the malefic position of Saturn ( Shani ) in the horoscope of a native. An Amethyst is found great, if used by scientists, physicians, astrologers, research scholars, mathematicians and those who have great deal of work related to mind and calculations as Amethyst has the divine power to empower the concentration.