I'm glad I dug this. Sounded scratchy on the excal, like a sound I would normally associate with a bottle cap. Found just a few inches down at the edge of the surf at low tide.
Trying to learn my Deus I dig it all...but I mentally call each target. I'm getting pretty good ...but one scratchy junk target turned out to be a small 14k filigree ring. I suspect the filigree pattern and the holey pattern in your ring contributed to the junk sound.