Malas are traditionally used to aid in meditation.  These have the traditional 108 beads on them and the belief is to repeat your mantra/prayer/chant as you touch each bead to reach a deep sense of peace and calm.  
Rose Quartz is known as the Stone of Universal Love.  It restores trust and harmony in relationships, encouraging unconditional love.  It purifies and opens the heart chakra at all levels to promote love, self-love, friendship, deep inner healing and feelings of peace and connectedness.
Chakras:   Heart