Minerals/Gemstones WHAT IS IT?

[Eqnn]

Hello I just found a box of a bunch minerals and stones and have no clue what most of them are! They could be real or pieces of colored plastic, I do not know. Here is one, I have MANY others.

This one is different shades of tan to red browns

 

Amazon Forum Fav 👍

Agony and Death on a Gold Rush Steamer: The Disastrous Sinking of the Side-Wheeler Yankee Blade - Grab it through Amazon!

[stdenis_jd]

needs a streak test...I'm inclined to say marcasite though

 

[DDancer]

What he said