Kuriositty
Newbie
Hello all,
I'm not new to rock collecting, but have no knowledge about indentifying rocks.
These few black rocks are extremely hard. I couldn't break them with a hammer. I tested them on concrete and the marks were white. All of them have this strange white rock crusted on the outside. In a certain light some parts are slightly shiny.
These rocks to me look like they are rusty. Very dull looking rocks.
I know these are very common, but I've never seen one this big. Is this a type of quartz?
Is this a type of sandstone? I found it in a lake. It's very eroded, it crumbles very easily, even more so in water.
I know this is a rock that has a lot going on. I do believe there is a little bit of quartz crystal in some of holes in the rock as well as the white stripe running through it.
Any help would be appreciated. Thank you!
I'm not new to rock collecting, but have no knowledge about indentifying rocks.
These few black rocks are extremely hard. I couldn't break them with a hammer. I tested them on concrete and the marks were white. All of them have this strange white rock crusted on the outside. In a certain light some parts are slightly shiny.
These rocks to me look like they are rusty. Very dull looking rocks.
I know these are very common, but I've never seen one this big. Is this a type of quartz?
Is this a type of sandstone? I found it in a lake. It's very eroded, it crumbles very easily, even more so in water.
I know this is a rock that has a lot going on. I do believe there is a little bit of quartz crystal in some of holes in the rock as well as the white stripe running through it.
Any help would be appreciated. Thank you!
