New Mexico Gem TrailsThis is field guide to give information to those interested in collecting gems, minerals, fossils and Indian artifacts in the field as a hobby. Book Fossils, Geology, Rocks & Minerals Author: Simpson, Bessie W. Publisher: Gem Trails Publishing Company Date Published: 1961 Number of Pages 88Leave a Reply Cancel replyYou must be logged in to post a comment. « The Gem & Mineral Collector’s Guide to Idaho Volume 1 » Rocks and Minerals of Michigan