Gem Trails of Pennsylvania and New Jersey by Scott Stepanski and Karenne Snow. Gem Guides Book Co., 315 Cloverleaf Dr., Suite F, Baldwin Park, CA 91706. 160 pages; 1996; $10.95 (softbound).

Geared toward the hobbyist collector, Gem Trails of Pennsylvania and New Jersey provides detailed collecting site information on such items as concretions; dendrites; picture sandstone; pebbles and nodules of quartz, agate, chert, and jasper; massive samples of fluorite, sphalerite, ...