Sapphire vs. Alumina — What's the Difference?

Difference Between Sapphire and Alumina
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Compare with Definitions
Sapphire
Sapphire is a precious gemstone, a variety of the mineral corundum, consisting of aluminium oxide (α-Al2O3) with trace amounts of elements such as iron, titanium, chromium, vanadium, or magnesium. It is typically blue, but natural "fancy" sapphires also occur in yellow, purple, orange, and green colors; "parti sapphires" show two or more colors.
Aug 17, 2022
Alumina
Any of several forms of aluminum oxide, Al2O3, occurring naturally as corundum, in a hydrated form in bauxite, and with various impurities as ruby, sapphire, and emery, used in aluminum production and in abrasives, refractories, ceramics, and electrical insulation. Also called aluminum oxide.
Aug 17, 2022
Sapphire
A transparent precious stone, typically blue, which is a variety of corundum (aluminium oxide)
A sapphire ring
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Alumina
Aluminum oxide, especially when used in mining, material sciences or ceramics.
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Sapphire
A small hummingbird with shining blue or violet colours in its plumage and a short tail.
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Alumina
One of the earths, consisting of two parts of aluminium and three of oxygen, Al2O3.
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Sapphire
A clear hard variety of corundum used as a gemstone that is usually blue but may be any color except red.
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Alumina
Any of various forms of aluminum oxide occurring naturally as corundum
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Sapphire
A corundum gem.
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Sapphire
The blue color of a gem sapphire.
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Sapphire
Made of or resembling a gem sapphire.
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Sapphire
Having the color of a blue sapphire.
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Sapphire
Of or relating to a 65th anniversary.
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Sapphire
(countable) A clear deep blue variety of corundum, valued as a precious stone.
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Sapphire
A white, yellow, or purple variety of corundum, either clear or translucent.
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Sapphire
A deep blue colour.
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Sapphire
(countable) Any hummingbird in the genera Hylocharis and Chlorestes, as well as the rufous-throated sapphire, which is now in the genus Amazilia.
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Sapphire
Any of the butterflies in the southern Asian lycaenid genus Heliophorus or the African lycaenid genus Iolaus.
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Sapphire
Of a deep blue colour.
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Sapphire
Pertaining to a 45th year
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Sapphire
Native alumina or aluminium sesquioxide, Al2O3; corundum; esp., the blue transparent variety of corundum, highly prized as a gem.
Of rubies, sapphires, and of pearlés white.
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Sapphire
The color of the gem; bright blue.
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Sapphire
Any humming bird of the genus Hylocharis, native of South America. The throat and breast are usually bright blue.
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Sapphire
Of or resembling sapphire; sapphirine; blue.
Aug 17, 2022
Sapphire
A precious transparent stone of rich blue corundum valued as a gemstone
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Sapphire
A transparent piece of sapphire that has been cut and polished and is valued as a precious gem
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Sapphire
A light shade of blue
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Sapphire
Having the color of a blue sapphire;
Sapphire eyes
Aug 17, 2022
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