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

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Found two light black rocks in Texas : r/whatsthisrock

The black parts form little stripes and are fine-grained. Granite

What are these shiny black rocks I keep finding randomly around my

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

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

Shiny black inclusions? : r/whatsthisrock

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

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

ID help. Is this glass or a stone?Shimmer changes as you move the

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