A friend gifted me a bag of rocks, these are some of my favorites. I’ll tumble them after my current batch is done in a couple weeks.
A friend gifted me a bag of rocks, these are some of my favorites. I’ll tumble them after my current batch is done in a couple weeks.
In looking up how to tell, I found this site helpful for someone with only a basic understanding of rocks and minerals.
https://www.geologyin.com/2014/03/cleavage-of-minerals.html
The lines look more straightish than diamondish to me, especially in that lower right one which is kinda rhomboid, so I think calcite. Good tip!