Technically, vermiculite encompasses a large group of hydrated laminar magnesium-aluminum-iron silicates, which resemble mica.
I don't know too much so I don't want to say too much. But I do know that vermiculite is closely related to mica. Thanks to a buddy, I got to collect some mica pieces a couple of months ago and I wanted to share them with you.
Mica is pretty cool. It's definitely shiny:
'round here, the mica is so common that little flakes of it make the soil sparkly everywhere you go.
Here's a cool page with more information: http://www.madehow.c...ermiculite.html
Edited by Sidestreet, 06 December 2017 - 06:39 PM.