Beads Of Rice with spring loaded pins

There are several threads on this topic with photos. I didn't do a comprehensive search, but this one popped up quickly.

TBH, I don't know how you would accumulate a pile of anything, but, as always, it is definitely possible to lose the little spring-bar. The thread I posted has detailed photos, but if that's TLDR, the OP can just study the bracelet a bit and use common sense.

In brief, compress the spring-bar from one side and displace that side of the link. Then, while holding the link to avoid having that side of the spring-bar fall back into place, compress the spring-bar from the other side, and detach the link. Repeat on the other side of the link, and then reverse the process to secure the bracelet. Before reattaching, double check that the grains of rice are in the correct orientation.

Some people will do this inside a plastic bag to avoid losing any small parts. At the very least, it's good to do it on a desk/table with a border around the edges, like a watchmaker's bench. You can set something up temporarily using the sides of a cardboard box.