Gem Trails of Texas by James R. Mitchell copyright 1987, with revised printing in 1991 sells for $12.95.  (The book printed lists a $7.95 price tag which is not current.)  Texas is well known for beautiful gemstones and more.  Get information or directions to collect your own  Woodward Ranch plume, Needles Peak agate, pom pom agate, fossils and much more with this nice 104 page field trip guide to many locations for gemstones and fossils in Texas.