This is not an ordinary rock. A peace of it broke off while dropped on the ground. It exposed its black insides; it’s coal. I thought I know what coal is. It seems things (like rocks) like to take different shapes and appearance, sometimes obvious but at times not so much.
I’m not sure where this one came from. It was displayed on my bookshelf for a while, no one paid any attention to it. When it dropped (intentionally), then chipped away, the smaller part disappeared; it’s still someplace in the garage while the original is back on the bookshelf.
View Project: Walls that breathe quiet