I want a catch that you can push to open, and push to close again.
I cannot find anything around my house that is fabricated in that
way, but it must be here because it is on the tip of my tongue
The reason you cannot find clasp “push to open/push to close” is
that because jewellery clasps are designed to be operated by one
hand. If clasp needs to be pushed to close, it would require second
hand to hold the clasp, while the other hand does the pushing. It is
possible for the necklace, but even there it creates a set of
problems. For bracelet, it would require a second person to assist,
and that is not always possible.