@Jasbir,
I am not a Jyotish or qualified astrologer. I know little bit of astrology because of my own interest in it.
First of all, Blue Sapphire & Ruby should not be worn together unless suggested by a good astrologer.
DOB (Date of Birth), TOB (Time of Birth), POB (Place of Birth) is required to get horoscope and I am not an expert in this field so you need to consult an astrologer at your end.