1st - I noticed this was your very first post - so, Welcome Aboard CherylAbrams! You didn't list your state (or country) in your profile. So, you might consider jumping over to Sub-Forums: Select Your Area.... and selecting location information (i.e., clubs, hunts, finds, legends, maps, etc.) directly related to your state (or country).
2nd - I moved from HELP! over to Forum: Rocks/Gems for more exposure.
The gray looks like cobblestone or rocks washed and tumbled in current of a river....but the white one is interesting to me. I hope someone can ID it. Welcome to the party,