Your brain tells you it is what?

The size of this object is 7 millimeter in height.

What do you make of it?

Or maybe you even know what it is, as I do not. There were some associations, but I will keep them to myself. As I do not want to spoil yours. To get a reasonable image I had to crop the original photo, creating a zoom in effect. Also I used the Snapseed app to enhance the image.

According to Wikipedia Pareidolia is the tendency for perception to impose a meaningful interpretation on a nebulous stimulus, usually visual, so that one sees an object, pattern or meaning where there is none.

Did it trigger it like that for you?