Hi naveen kumar,
According to your horoscope you are a Virgo ascendant ruled by Mercury. You are born in the Poorvabhadrapada nakshatra ruled by Jupiter. Currently you are undergoing through Saturn Mahadasha which will be operational till 02/06/2019. You were born in the Jupiter Mahadasha.
Rahu is posited in the 8th house of death, accidents, etc. and hence should not be given strength. So avoid Hessonite (Gomed).
Mercury rules the 1st house of self, personality, health, etc. and the 10th house of profession, career, etc. and is placed in the 6th house in the sign of Aquarius. Mercury is weak in Shadbala and thus needs to be strengthened. You may wear a Natural Emerald / Natural Peridot in Gold / Silver in Right Little finger. It should be worn on a Wednesday of a shukla paksha in the hora of Mercury.