A total of ten heart pebbles amounts to a weight unit. When it comes to mass, 10 stones equal one lb. If you have 10 love pebbles, these would measure around one pound. A total of ten charming heart-shaped rockets compose 1 lb in weight. If you have a collection of 10 stones made in the shape of hearts, they will amount to around one pound. The weight of heart pebbles totals to around 1 lb.