It would be VERY helpful if gave a somewhat location as where these samples were found. Also you may want to check and see if any of the samples are attracted to a magnet. If they are magnetic then it is a ''possibility'' that they could be meteorites. Maybe?
Welcome to the forum,
Not meteorites. Location would be of some help. Test for magnetism and a streak test for color. Most of the black and red bits look to be any of the following : limonite, hematite, magnetite and some quartz mixed in. The white one appears to be a granite or quartz mix. Value is in the eye of the beholder, if you like them keep'm