Identification Beryl (Aquamarine and Emerald) Identification Sheet The beryllium silicate behind emerald, aquamarine, and morganite: long hexagonal prisms, harder than quartz, in pegmatites.
Identification Azurite Identification Sheet The deep azure-blue copper carbonate, malachite's constant companion, confirmed by its light blue streak and acid reaction.
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…
Identification Selenite (Gypsum) Identification Sheet A very soft sulfate you can scratch with a fingernail, forming clear bladed crystals, satin spar, and desert roses.
Identification Hematite Identification Sheet The most important iron ore, identified by its diagnostic reddish-brown streak regardless of the specimen's outward color.
Identification Muscovite Mica Identification Sheet The sparkly sheet mineral in every granite — and the one that makes students understand cleavage for the first time.
