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.
Corundum can scratch all minerals except diamond, making it the second hardest mineral on the Mohs scale with a hardness of 9. Diamond, with a hardness of 10, is the only mineral that can scratch corundum.
Corundum's luster is metallic.
Ruby (corundum) has a vitreous or glassy luster.
Corundum typically exhibits a vitreous to subadamantine luster. This means it has a glassy appearance, though it can also have a slightly more reflective quality akin to that of diamonds in certain conditions. The luster can vary slightly based on impurities and the specific form of corundum, such as sapphire or ruby. Overall, its luster contributes to its appeal as a gemstone.
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)
Talc and corundum can be distinguished primarily by their hardness and appearance. Talc is the softest mineral on the Mohs scale, with a hardness of 1, while corundum is much harder, rated at 9. Additionally, talc typically has a greasy feel and a pearly luster, whereas corundum has a more glassy appearance and can be found in various colors, including blue (sapphire) and red (ruby). Visual observation of these characteristics, along with a simple scratch test, can help differentiate the two.
Corundum.
Corundum ( (Al_2O_3) ) is hexagonal in crystal structure.
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 in the trigonal crystal system.
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.