mineralogy

The Many Shades of Fluorite

When you’re first learning mineral identification, it’s tempting to use color as the main distinguishing factor. It’s the first visual clue you perceive, and we gauge so many other things in our lives by color. However, as many know, color is hardly ever a good property for accurately identifying minerals. Take these fluorite (CaF2) samples… Continue reading The Many Shades of Fluorite

mineralogy

Common minerals to know

Here are some common minerals whose names and formulas are good to know, along with some of their properties! (In rows, left to right; H=hardness, tested in lab using Mohs hardness scale) 1) Halite (NaCl) – H=3.5; it tastes salty! (yes, lick it) 2) Fluorite (CaF2) – H=4; ranges from transparent, to purple, to blue 3) Sylvite… Continue reading Common minerals to know