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Yes. Corundum will scratch topaz and every other mineral with a hardness of 9 or lower on the Mohs hardness scale.
Rubies are part of the corundum mineral group.
No. Diamond is the hardest mineral. It measures 10 on the Mohs scale: Corundum measures 9, which is less hard than diamond, as below.
spinel,rutile,rubelite,rubasse,rose quartz,jacinth,red zircon,garnet,cornelian,beryl,almandine
Corundum is a mineral composed of aluminum oxide with traces of other elements that give it its various colors. It is commonly known for its gem varieties such as ruby and sapphire, which are prized for their beauty and hardness. Corundum is one of the hardest minerals, second only to diamond, making it ideal for use in various industrial applications.
Corundum.
Corundum ( (Al_2O_3) ) is hexagonal in crystal structure.
Corundum is in the trigonal crystal system.
Corundum is used for jewlery
Red corundum is called ruby.
Corundum is aluminium oxide, Al2O3.
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.
According to the Mohs scale of mineral hardness, quartz (7) will not scratch any mineral with a higher number on the scale. Corundum is listed at 9. Therefore quartz will not scratch corundum, but corundum can scratch quartz.
Corundum is a mineral, therefore it could not be the hardest rock.
Corundum is used as an abrasive powder to polish lenses.