The thing you have in your head instead of a brain
diamond because it is beautiful and the hardest type of rock
The diamond is the hardest rock (or mineral).
Corundum is a mineral, therefore it could not be the hardest rock.
be carefull before weathering is not allowed for sedimentary.
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.
Music or an actual rock?
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).