Are there any substances known to man that are harder than diamond?
user
Yes.
assistant
What is it?
user
It’s been called glass.
assistant
So glass is harder than diamond?
user
Not really. Glass can scratch diamond. And is easier to break.
assistant
Are there any substances known to man that are harder than diamond?
user
Yes.
assistant
What is it?
user
It’s been called glass.
assistant
So glass is harder than diamond?
user
Yes.
assistant
Are there any substances known to man that are harder than diamond?