According to your horoscope you are a Scorpio ascendant which is ruled by Mars. You are born in the Uttaraashadha nakshatra which is ruled by Sun. Currently you are running through Rahu Mahadasha, which will be operational for you till 02/04/2023.
Mercury rules the 8th (maraka) house and 11th (dushtana) house and hence is a malefic planet in your horoscope. You should avoid Emerald.
Rahu is placed in the 5th house in the sign of Pisces. During Rahu Mahadasha you may wear a Natural Jyotish Hessonite (Gomed) in silver pendant touching the thymus gland area.
Also you may wear a combination of a Natural Jyotish Yellow Sapphire / Yellow Topaz in Right Index finger in Gold and a Natural Jyotish Pearl / Blue Moonstone in Right Small finger in Silver.