Identification Muscovite Mica Identification Sheet The sparkly sheet mineral in every granite — and the one that makes students understand cleavage for the first time.
Identification Amethyst Identification Sheet The purple quartz that has captivated collectors and jewelers for millennia — and fades if you leave it on the windowsill.
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 Fluorite Identification Sheet The mineral that gave fluorescence its name — and comes in nearly every color imaginable.
Identification Feldspar Identification Sheet The mineral that makes up 60% of the Earth's crust — and still trips up new collectors.
Identification Calcite Identification Sheet How to confirm calcite using hardness, cleavage, and the dilute-acid reaction test.
Identification Quartz Identification Sheet Field identification cues for quartz and its common varieties, with a decision path for separating it from lookalikes.
