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 Hematite Identification Sheet The most important iron ore, identified by its diagnostic reddish-brown streak regardless of the specimen's outward color.
Identification Onyx Identification Sheet A banded chalcedony with a parallel-layered structure, a hardness that outlasts most imposters, and — in this particular library — a name…
Identification Olivine (Peridot) Identification Sheet The green mineral that makes up much of the Earth's mantle — and surfaces as gemstone peridot when conditions align.
Identification Turquoise Identification Sheet One of the world's oldest ornamental stones — and one of the most frequently faked.
Identification Garnet Group Identification Sheet Not one mineral but a family — hard, dense, and found in almost every metamorphic rock Rockies encounter.
Identification Obsidian Identification Sheet Volcanic glass that looks like a mineral but technically isn't — and produces the sharpest natural edges known.
Identification Feldspar Identification Sheet The mineral that makes up 60% of the Earth's crust — and still trips up new collectors.
Identification Pyrite (Fool's Gold) Identification Sheet How to tell pyrite from actual gold — and why every newcomer gets fooled at least once.
