Corundum is a hard mineral, a form of aluminium oxide which occurs in sapphires and rubies.
Yes. Corundum will scratch topaz and every other mineral with a hardness of 9 or lower on the Mohs hardness scale.
Sapphire is a type of Corundum. Corundum is a lattice of Aluminium Oxide, Al2O3 It is impurities within the lattice that give corundum a different colour, upon which it is known under different names. Trace amounts of Iron and Titanium within the corundum give the traditional blue colour, but are not part of the chemical structure as such, imagine them to be like marbles embedded in concrete, at a molecular level.
It is aluminium oxide: Al2O3.
No. Diamond is the hardest mineral. It measures 10 on the Mohs scale: Corundum measures 9, which is less hard than diamond, as below.
Corundum.
Corundum is not magnetic.
Corundum ( (Al_2O_3) ) is hexagonal in crystal structure.
Corundum is used for jewlery
Red corundum is called ruby.
Corundum is aluminium oxide, Al2O3.
Corundum is in the trigonal crystal system.
Pure corundum is clear in color.
Diamond is the hardest mineral and is the only one that can scratch corundum. but in my opinion corundum will scratch corundum any mineral of the same hardness will scratch the other !
Red corundum is called ruby.
100% of rubies are corundum. "Ruby" is a name made up by the gem trade for the mineral known as corundum, when it is red.
Corundum is a mineral, therefore it could not be the hardest rock.