I recently moved my old fridge to the basement, and took the doors off to get it around the house. I reassembled it today, and I think I came up with an extra part. Here's a picture:

Its about 1 inch long and screws in half (the left part appears to be some sort of diffusion-type stone), and has the following markings on it: "1.00" & "70º A"

Any help anyone could provide in identifying this part (or letting me know that it doesn't go in my fridge) would be greatly appreciated.

Awesome! Thanks so much!