@ trepti,
You are born in Lagna Gandaant (ending degrees of the Lagna/Ascendant), so if there is slight change in recording your birth time or exact location co-ordinates your ascendant will change from Thula/Libra to Vrishchika/Scorpio, so I would not prefer taking any chances with your destiny, by dvising based on your birth time.
Looking at your horoscope, you have Grahan yog formed due to tight conjunction (yuti) of Moon and Ketu. You should thus wear Pearl (7 or 8 carats/rattis) set in silver, make note that the pearl should NOT touch the skin.
Wishing you good luck, may God bless you, and above all????
Cheers