First off Rem Welcome to the forum.
I hope you weren't put off by sanmateo or Piratess's posts , but what they are saying is a lot of folks don't open attachments for fear of them containing a Virus. I too feel there is a bit of discomfort opening them...
Your first post contained the picture, but your following posts were links to your attachment, hence the posts.
All that said when posting pictures use the "GO Advanced" tab and upload your pics that way.
Sorry I'm no help on your rock specimens.