According to your horoscope you are Taurus ascendant which is ruled by Venus. You are born in the Rohini nakshatra ruled by Moon. Currently you are running through Jupiter Mahadasha, which will be operational till 31/12/2021.
Saturn rules two auspicious houses, 9th house of luck, fortune, spirituality, etc. and the 10th house of profession, career, etc. and hence is a yoga karaka and is placed in the ascendant. Wearing a Blue Sapphire / Iolite / Amethyst in Right Middle finger will help you progress in your career. Blue Sapphire should be set in Panchdhatu / Gold and is worn on a Saturday of a shukla paksha in the hora of Saturn.