Catholic blessings
Are Catholic blessings valid? Is there any church canon that condemns other blessings, I know the Catholic Church views our blessings such as water, Eucharist, palms, etc as valid but I don't know if it is the other way around. I'm asking because I have received a few Catholic things that are blessed such as a rosary and some holy water. Also just a side question is it wrong or looked down upon to believe some Catholic miracles? Like the Marian apparitions or the st Michael apparition at the gorgano cave? Just wondering, thank you.