Hi, Lydia —

Thanks for the question.

Because it's my understanding that that in private revelations of Our Blessed Mother, this is what the faithful have experienced.

This makes sense because of the close correlation of Our Blessed Mother to the Rosary, a word that comes from Latin and means "a garland of roses". The rose is also one of the flowers used to symbolize the Virgin Mary.

From our colleagues at Catholic Answers:

If you were to ask what object is most emblematic of Catholics, people would probably say, "The rosary, of course." We’re familiar with the images: the silently moving lips of the old woman fingering her beads; the oversized rosary hanging from the waist of the wimpled nun; more recently, the merely decorative rosary hanging from the rearview mirror.

Hope this helps,

Mike