In an ideal world . . . .
You go to the gardai to report a stolen bracelet . . . "And where was this article last seen ?" . . . . "Bowling Alley, they said they had it behind the counter" . . . . "Is that so, let's go down and ask them a few questions so".
At the Bowling Alley the Garda asks who was taking phone calls that day at that time, asks them if they took your call, etc . . . and through a small amount of work establishes who had it. Even if it doesn't result in getting your bracelet back it puts the frighteners on everyone working there so they know that next time they try it they will be on the spot again.
The reality of course is nothing like this - the perception (for some people) is that this wasn't actually a crime despite the clear indications from your post. I agree that it is possible that someone did actually misplace it after talking to you, but since nobody is admitting to even having the conversation that you know you had, this may not be the case. So, you go to the Garda station, report the crime and will likely be met with indifference. "Sure, it's only an oul' bracelet missus" is one possible response, but you get my drift.
I suggest filing the report anyway, you might be pleasantly surprised and if you don't try you can't expect anything.
z