Without actual proof you need to tread really softly here.
You have no facts to go on and making up stories in your head about anothers guilt is not acceptable.
For all you know it fell off the table, is under a throw rug, the cat swatted off the table and under the fridge, you or someone else picked it up and you forgot…etc. etc.
It may seem suspicious but you need to be very careful before accusing someone.
Did this person call and ask about any problems because you were acting funny around them when they were at your house?
If you were acting weird they might just be picking up the weird vibes and wondering if you are upset about something.
Is this person trustworthy to begin with?
Are they broke, in dire financial straights, drug users, etc.?
If so then maybe you are correct, but still…tread lightly I say.