unidentified rock

  1. No idea please help

    I have no idea what kind of rocks these are but if you can help me identify these it would be greatly appreciated. Thank you
  2. Anyone know what these are?

    Had some rocks I got three of these from an estate sale a while back. The other I found in Lake Michigan. Not sure what they are. Any takers? (top one is from Lake Michigan. 2nd one is yellowish with black elongated crystals, 4th one is a deep green color, and last one is like a quartz...