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