My collection: Obsidian

Hello everyone! Today I will show you my obsidian collection. As I told you earlier I love to collect some minerals and metals,so today I will show you my Obsidians.

Here are all obsidians in my collection at this moment.
Many ancient people as Aztecs and Incas made spear blades and arrow heads from obsidian.

I found it,I haven't made it myself I just found it and this too

Look how sharp and dangerous it is