Ten heart pebbles amounts to a lb.
In terms of mass, 10 pebbles equal one pound.
If you have 10 love rockets, they'd weigh about 1 pound.
10 charming affectionate pebbles compose a lb in weight.
If you have several ten pebbles made in the shape of hearts, it will sum to around 1 pound.
Ten love rockets totals to approximately 1 lb.