Appraisal of real estate, and dealing with eminent domain have been my profession for 23 years. I think people may be confused by all of the different responses and comments here.
1). All states are not equal. Some don't have a public office where you can go and find out the mineral rights ownership on your land. It usually takes an extensive title search.
2). If 100% of the mineral rights are available on the land you buy - Celebrate!! You are in the HUGE minority. But realize that if this is the case, there probably aren't any minerals, surface, sub-surface, or otherwise, or any other type of recoverable resource on your land that anyone will ever be interested in. If there were, the mineral rights would have been sold off (most at least) a LONG time before you came along.
3). Eminent domain does NOT mean that the government or corporations "take away" or "give away" your land. The Constitution requires that "just compensation" be paid for any land or property rights taken be paid for a full fair market value. In the hundreds of cases I've been involved with, the condemning authority more often than not, paid MORE than market value, allowing the property owner to upgrade their living situation, etc. Without eminent domain, there would be no roads, no public utilities, no power plants, etc.. I'm not saying there aren't abuses. Of course there are. But "eminent domain" is not entirely the huge evil that some people are led to believe. More like a necessary evil I guess (usually!!). The exception of course would be building sports stadiums, helping developers assemble land for development, etc. I don't agree with these abuses at all. But if you're living in a $150K house, and the local quasi-governmental sports authority ends up giving you $200K ......