1st - Welcome Aboard! You didn't list your state (or country) in your profile. So, you might consider jumping over to Sub-Forum: 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 ya over to WHAT IS IT? for more exposure.
The vesicles would indicate something volcanic, or man-made slag. If you were hoping for meteorites, they aren't (because of the vesicles).
Details of where you found them, a judgement on density, whether they are attracted to a magnet (and, if so, how strongly), hardness, and a streak-test result might help narrow it down.