I do not own the land, just the mineral rights. I am asking b/c I have sold the rights and need to know if that qualifies for the Oklahoma capital gain "Exclusion from income". I have had the rights for 20 years.
That is really more of a legal question than a tax question. However, since mineral rights are a severed portion of the land rights themselves (they're separated from the land's "surface rights" and sold separately by deed, just like the land itself), they are usually considered real property.