What are these black shiny rocks in my yard? They are about the size of a nickel : r/whatsthisrock

What is this weird mess I found in my backyard? Black circles are shiny like glass. : r/whatsthisrock

Recently new to sudbury . Found some cool rocks renovating our home : r /Sudbury

Found this shiny, rainbow black rock on NJ beach. Lightweight, marks Grey. Think it's anthracite coal. Can anyone confirm? : r/whatsthisrock

Black shiny rock found in farmers field : r/whatsthisrock

Identity Help : Please help me ID this rock with black mineral

Bought a ton of amazing stuff at a yard sale. Will post some later when I go through it. But BIG QUESTION. Is this asbestos??? It's heavy and shiny flakes are coming off. It dawned on me it may be so I put it in a ziplock. : r/whatsthisrock

Black shiny rock, relatively heavy. could it be a meteorite? found in Flumserberg, Switzerland. : r/whatsthisrock

What is this weird mess I found in my backyard? Black circles are shiny like glass. : r/whatsthisrock

What Is This? Shiny Black Speckled Rock? : r/whatsthisrock

Mystery rocks in California: greenish-black/one with green veins, smooth, won't scratch with steel knife, both of them feel like silk, very heavy and dense. What are they? : r/whatsthisrock