What are these shiny black rocks? They almost look like glass. Bonus feline formation. : r/whatsthisrock

How to tell the Difference between Black Onyx, Jet, Apache Tear

UPDATE* Big shiny metallic rock is strongly attracted to magnets

Black, heavy stone with layers and bubbles : r/whatsthisrock

I carried this 26lb monster 6 miles so I could ask you guys what

What are these shiny black rocks? They almost look like glass

Can anyone Identify this black glasslike rock for me please? : r

Black glassy rock spotted with white : r/whatsthisrock

Found two light black rocks in Texas : r/whatsthisrock

What are these shiny black rocks? They almost look like glass

What is this black material on the surface of this stone? Almost

Help identifying black, shiny rock : r/whatsthisrock

Does anyone know what Rock this is. It's quite shimmery. : r