marble is natural
There are man made imitations but real granite is a natural rock.
A rock that is found in naturally and hasn't been made by man (man-made).
Natural. It is a sedimentary rock composed of, mainly, sand (!) derived from the weathering and erosion of other, originally mainly igneous, rocks.
It is natural but there are man-made imitations.
marble is natural
No it is not man made
Marble is a nature made metapmorphic rock!
Marble is a nature made metapmorphic rock!
No, marble is a metamorphic rock that forms naturally from limestones.
There are man made imitations but real granite is a natural rock.
A rock is natural, the handaxe was the first man-made tool.
A rock that is found in naturally and hasn't been made by man (man-made).
No, shale is a natural form of rock.
Natural. It is a sedimentary rock composed of, mainly, sand (!) derived from the weathering and erosion of other, originally mainly igneous, rocks.
Rock art is an archeology term. Essentially, rock art is a term used to describe man-made markings placed on natural stone.
There is natural chalk. The sticks that the teacher uses to write on slate blackboards is powdered natural chalk compressed into sticks with some binder; so they are man made.