The luster of the sapphire is vitreous or adamantine.
THE EIGHT WAYS TO I.D. A MINERALThe eight ways to identify a mineral such as corundum are 1 hardness 2 crystal shape 3 special features 4 density 5 streak 6 luster 7 cleavage or fracture 8 color. (to find out hardness look up "Mohs scale of hardness" everything else you could search it on google or bing)
Ruby cannot be considered either as it is not an element. It is primarily made of corundum, which is a compound of aluminum (a metal) and oxygen (a nonmetal).
Small traces of iron are responsible for much of the color found in corundum (saphire) gems. Ruby, however, does not contain iron and will not be affected by a magnet. To be technical however, I should point out that corundum is not magnetic. Corundum will not attract other pieces of iron to itself (as far as I know). To simply answer that corundum is not magnetic would have been misleading.
Corundum, also known as aluminum oxide, is not magnetic. It is a diamagnetic material, meaning it does not have any magnetic properties and is very weakly repelled by magnetic fields.
Diamonds do not have a metallic luster; diamond luster is adamantine to waxy.
Corundum's luster is metallic.
Ruby (corundum) has a vitreous or glassy luster.
THE EIGHT WAYS TO I.D. A MINERALThe eight ways to identify a mineral such as corundum are 1 hardness 2 crystal shape 3 special features 4 density 5 streak 6 luster 7 cleavage or fracture 8 color. (to find out hardness look up "Mohs scale of hardness" everything else you could search it on google or bing)
Corundum.
Corundum ( (Al_2O_3) ) is hexagonal in crystal structure.
Corundum is in the trigonal crystal system.
Ruby cannot be considered either as it is not an element. It is primarily made of corundum, which is a compound of aluminum (a metal) and oxygen (a nonmetal).
Corundum is used for jewlery
Corundum is a hard and tough mineral that typically feels smooth and dense. It often has a distinct vitreous luster and can range in color, with common varieties being red (ruby) and blue (sapphire). When cut and polished, corundum can appear transparent and exhibit strong brilliance.
Sapphire is a mineral itself. It is the blue variety of the mineral corundum. Sapphire is a very hard mineral at a 9 on the Mohs scale of 1 - 10. Sapphires usually have a glassy luster which makes them perfect for jewelry. They can also be colors other than blue; however, sapphires are never red. The red variety of corundum is a ruby.
Red corundum is called ruby.
Corundum is aluminium oxide, Al2O3.