Field Guides Five-Minute Field Tests: Streak, Magnetism, and Heft An educator packet of fast, cheap, decisive identification tests — streak plate, pocket magnet, and hand-weighing — with classroom demos.
Field Guides Pegmatite Prospecting: Where the Big Crystals Hide How to recognize pegmatite bodies in the field and read their zones for topaz, beryl, tourmaline, and giant micas.
Field Guides Desert Evaporites: Halite, Gypsum, and Playa Minerals A pocket reference to the minerals of dry lakes and salt flats: halite, gypsum, and the borates, and how playa crusts form.
Field Guides Reading Rocky Mountain Geology in the Field A regional primer on the rock units, structures, and collecting settings members encounter across the Mountain West.
Field Guides Crystal Systems and Crystal Habits A pocket reference to the seven crystal systems and the everyday habits—cubic, prismatic, botryoidal, bladed—you actually see on specimens.
Field Guides Fluorescent Minerals Under Ultraviolet Light How and why some minerals glow under UV, with a safe workflow for using shortwave and longwave lamps in the field and at displays.
Field Guides Peridot and Olivine in Volcanic Terrain How to find gem-quality peridot and fresh olivine in basaltic volcanic landscapes.
Field Guides Gemstone Identification at Rock and Gem Shows A practical guide to not getting taken — and finding the real deals — at gem and mineral shows.
Field Guides Reading Sedimentary Rock Sequences in Road Cuts How to read a road cut like a geologic timeline — and what to look for before you pull over.
Field Guides Responsible Collecting on Public Lands Plain-language guidance on permissions, site etiquette, and leave-no-trace collecting across public land jurisdictions.
