You hv gemini ascendant, so the current stones advised by your astrologer are good for you, in general common terms.
If someone suggessts Yellow sapphire for marriage problems, you should not wear it, wearing yellow sapphire will not solve the problem at all.
Never wear anything related to Jupiter att all, it is badhak and marak for you.
Wishing you good luck, may God bless you and above all?
CHEERS.