biotite

Not sure what type of stone/gem this is. Found an abundance while landscaping. Sorry I'm new to this and trying to get as knowledgeable with this as possible. Rock finding has become a hobby of my wife and myself. Any insight would be greatly appreciated.

I am posting a video of my rock specimens at "Got A Rock you Want Identified? Post it here! gimme a good picture or 3 or 4!" contributor "Dusted You" on this site. My original question was about this being gold or mica. My YouTube site is Georgia Gold. You can see my "gold" videos there. I...