Identification Talc Identification Sheet The Mohs 1 anchor at the bottom of the scale: so soft a fingernail scratches it, with a greasy, soapy feel no other common mineral shares.
Identification Magnetite Identification Sheet The strongly magnetic iron oxide: black streak, octahedral crystals, and a pull on the pocket magnet no lookalike can match.
Identification Corundum (Ruby and Sapphire) Identification Sheet The Mohs 9 anchor at the top of every field kit: ruby and sapphire are the same mineral, identified by extreme hardness and barrel-shaped…
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.
Identification Hematite Identification Sheet The most important iron ore, identified by its diagnostic reddish-brown streak regardless of the specimen's outward color.
Identification Quartz Identification Sheet Field identification cues for quartz and its common varieties, with a decision path for separating it from lookalikes.
