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 Selenite (Gypsum) Identification Sheet A very soft sulfate you can scratch with a fingernail, forming clear bladed crystals, satin spar, and desert roses.
Identification Rhodochrosite Identification Sheet Colorado's rose-pink state mineral: a manganese carbonate identified by color, low hardness, rhombohedral cleavage, and a warm-acid react…
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 Calcite Identification Sheet How to confirm calcite using hardness, cleavage, and the dilute-acid reaction test.
