Obsidian

ObsidianA usually black or banded, hard volcanic glass that displays shiny, curved surfaces when fractured and is formed by rapid cooling of lava. Enjoy.


Much thanks to ~invaderjohn & ~drumss for the inspiration.

Thanks to ~sweatyfish for browserui. I slightly modified, hope you don't mind.

This is an entertaining hobby and I'm enjoying the work.
Much thanks to the society of dA. It feels good to have a global commonality.