I wouldn't go accusing your daughter though cuz, if she really didn't take it, it will cause major problems in your relationship. If she did take it, chalk it up to a loss. There's nothing you can really do about it. You can continue to have a good relationship with your daughter, but lock up any valuables that you have...just in case.

Look, in the past few months, anything could have happened to those coins. Maybe you put them away someplace 'safe' and forgot about it--I've done things like that. Maybe a guest in your home took them. Or possibly you had someone in doing work (electrician/plumber/rug shampooer/chimney sweep). If your home is anything like mine, I don't know how you could assume that one person was the likely culprit--so many people come in and out of a person's home in a few months.

Surely you have some record of the coins--I collect them, and keep a detailed log of what I have, when/where I bought it and for how much. You have to, to be able to have the proper documentation. Your husband almost certainly has those records someplace. I'd take a look around to see if you can find them.

Lastly, I'd strongly recommend that if you have any other valuable items, take pictures of them for a record (and store the pictures away from the items themselves), and please, get yourself a safe and have it properly installed. With coins, you really do have to be so careful, because they're small, easy to hide/transport, hard to trace and easy to sell.

Even so, I'd call the police and make a report. They will understand that if this was your husband's collection you may not have so many details--but you still need to report it, and who knows, something may just turn up. Sorry about yoru loss, good luck with working through the aftermath.