Ten heart pebbles is equivalent to a weight unit.
Regarding mass, 10 rockets equal one lb.
Should you own 10 love rockets, they'd weigh about one pound.
A total of
ten lovely heart-shaped rockets compose a pound in weight.
If you have multiple 10 pebbles made in the shape of hearts, it will sum to about one lb.
10 affection stones is equal to to around a pound.