Apparently scientist think the human skull is harder than a coconut.
A coconut
The size is like a coconut but it is not a harder. And it is full of milk
No. Slate is harder. Slate is shale that has been heated and compressed.
It will vary on the variety and size of coconut but generally they will have about half litre of coconut water.
The coconut has a frond like leaf, The banana has a solid large blade-like leaf. A banana is a herb not a tree.
No, Limestone is harder than chalk.
No. Diamond is harder than emerald.
no, teeth are harder than rocks
No, diamond is harder than enamel.
The size is like a coconut but it is not a harder. And it is full of milk
It is harder to walk on moon than on earth