Key Trinket Filigree Necklace

A vintage key with a beautiful bit of filigree with a piece of apatite hanging from it.  They're hanging on a beautiful beaded chain with blue/teal beads.  This key has a unique shape to its hole, but it is also one of the ones that has definite signs of age.  It is a bit warped, and has a little scarring on it, but it's still beautiful!  Please look at the photos to see details! 

Chain measures approximately 36 inches.  Key is about 2.25 inches long.

These are vintage keys (some may be antique and not vintage, I don't have exact dates for them), and they have signs of age to go with it, so please look closely at the photos.