[jdkuepper]

If you’re referring to the shiny pieces in soil you buy from a garden shop, that’s actually perlite - a natural volcanic glass that’s added to improve soil drainage.

[hammyhavoc]

I don't think so, it's smaller multicoloured specks. All sorts of interesting colours.

[herbst]

It's not perlite. It's colorful plastic and also smells like that when burned.