Here is what I came up with based on what I have and what Dave has. 9 of them and I didn't count a polished one I have seen pics of... But I am brain dead so no telling....
Wall, is the wall of the hole.
Grey Vertical wall, offset edge, thick (older version)
Silver tapered wall, no offset edge, thinner
Gold Crystal tapered wall, no offset edge, thinner
Silver Crystal tapered wall, no offset edge, thinner
Smooth Black tapered wall, no offset edge, thinner
Textured Black tapered wall, no offset edge, thinner
Blade Holes Gold Crystal tapered wall, no offset edge, thinner
Blade Holes Silver tapered wall, no offset edge, thinner
Blade Holes Black tapered wall, no offset edge, thinner