The hardest substance in a rock would be the hardest mineral of which the rock is composed.
The third hardest gemstone is ruby and then the fourth hardest is emerald.
The hardest mineral is diamond, which has a hardness of 10 on the Mohs scale.
The hardest substance that is naturally occurring is a diamond. However, there are harder substances that have been made by scientists in labs.
The hardest rock is PANTERA, or Diamonds. Depending on your question.
Cuando = whenEllos leen = They readel libro = the book- Cuando leen ellos el libro?When do they read the book?
diamonds are the hardest
Diamonds are the hardest mineral and the agate is the secod hardest mineral.
From what I hear, One is the hardest & Master of Puppets is second hardest.
Diamond is the hardest precious stone
the hardest i can think of is "What is the answer to this question?"
Madagascar is the hardest to fake.
Expert is the hardest.
yes.
The hardest substance in a rock would be the hardest mineral of which the rock is composed.
The hardest matter on earth is Diamond.
the hardest precious stone is the diamond