Music or an actual rock?
The diamond is the hardest rock (or mineral).
Corundum is a mineral, therefore it could not be the hardest rock.
The hardest substance in a rock would be the hardest mineral of which the rock is composed.
Diorite is the second hardest rock in the worl - Vellond
The hardest rock is PANTERA, or Diamonds. Depending on your question.
Diamonds are the hardest rock.
yes
Corundum.
The softest rock is generally talc, with a Mohs hardness of 1, while the hardest rock is diamond, with a Mohs hardness of 10. Other common rocks fall in between, such as gypsum (2), calcite (3), quartz (7), and feldspar (6-7).
The harder rock is diamond
Yes, it is the hardest natural rock on earth.
diamond