Proof of Fairies?

Do you believe in fairies? I'm beginning to think I do. This morning I found this tiny ring outside my laundry room  door. It was not there yesterday (or the day before, or the day before that), and no one under the age of forty-seven has been in my house for at least ten days.

I tried to take photos that would put its tininess in perspective.  Of course, I could have set out a measuring tape, but that would have been too logical. How could I be logical when I looked down and saw this circle of 'rubies' just lying on the floor by a closed door inside my house?  I am imagining a fairy was passing through my home (would it have been tiptoeing or flying?) last night as I slept--maybe slipping past the screen on an open window (screens wouldn't prevent fairies from getting in, would they?) to my basement level garage where it is delightfully cool. I am utterly flummoxed regarding a rational answer.