Just a mom from south Jersey here. Zip 08343, if it matters. After sort of digging around my pond in a billion rocks, my son and I found some and I don't know exactly what they are. See pic... I am thinking the round ones on the left with "stuff" ( forgive my lack of technical knowledge, school was a long time ago) in them are some sort of geodes? What type, i do not know.... the green see thru one on the right is really cool.... has a couple bubbles of whatever material it is, inside of it. The one below that looks like a gold nugget (that I wish it was, but I won't be that lucky) - I have no idea... It measures on the metal/gold side of a metal detector reading, but I"m at a loss, yet again. And I suppose the small pieces are some sort of crystal? I could be totally wrong here, but I don't really know what I"m looking at and my son is 9, so saying he's inquisitive is an understatement. Any and all help here would be greatly appreciated!! Thanks so much!!