Ten heart pebbles equals 1 pound.
Regarding mass, 10 rockets are equivalent to one lb.
If you have a total of ten heart pebbles, these would measure around one pound.
10 charming love-shaped pebbles form 1 lb in weight.
If you have multiple ten stones made in the shape of hearts, they will amount to around 1 pound.
10 heart rockets totals to about a pound.