Sudipto,
1. None of the above mentioned gemstones as this will create you problem for your luck and marriage issues as they are inter related.
2. No
3. Yes you will get married for that you need to wear diamond of atleast 0.2 carat or white zircon of 6 carats set on silver ring wear it to your right hand little finger after properly energizing it and under auspcious muhurtham based on your horoscope.
GOD BLESS!!!
Srinivasa Temkar