How to identify mineral luster without calling every rock shiny
What happens when a mineral surface interacts with light is a better question than,…
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How to Differentiate a Scratch from a Powder Smudge
After you scrape the mineral specimen with a metal implement, you will see a…
A Gentle Approach to Hardness Testing Using the Mohs Scale
Hardness on the Mohs scale is determined by the ability of one mineral to…
Why Mineral Color Is a Clue, Not a Final Identification
When you set two green minerals side-by-side, they may appear very similar at first…