It is not/does not:
The eye of the little yellow god
The title of a book
A tool with wooden handle and metal business end
Have anything to do with grass
Not found underground
Part of fokelore of a particlar people
A weapon
Harry Potter's staff - but the right line of thinking
Contain a gem stone
The Mona Lisa smile
Have connection with Lord of the Rings
From a television series
Have magical properties
It is/does:
Have a very faint connection with Ireland but this would be misleading
Have punctuation in it
Fictional
Wood in the vegetable part
Contain a possessive apostrophe
Have metal fixings of some sort - but there's (more important) mineral parts as well
Pre-date 1950