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Sapphire vs. Alumina — What's the Difference?

Difference Between Sapphire and Alumina

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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
Aug 17, 2022

Alumina

Aluminum oxide, especially when used in mining, material sciences or ceramics.
Aug 17, 2022

Sapphire

A small hummingbird with shining blue or violet colours in its plumage and a short tail.
Aug 17, 2022
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Alumina

One of the earths, consisting of two parts of aluminium and three of oxygen, Al2O3.
Aug 17, 2022

Sapphire

A clear hard variety of corundum used as a gemstone that is usually blue but may be any color except red.
Aug 17, 2022

Alumina

Any of various forms of aluminum oxide occurring naturally as corundum
Aug 17, 2022

Sapphire

A corundum gem.
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Sapphire

The blue color of a gem sapphire.
Aug 17, 2022
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Sapphire

Made of or resembling a gem sapphire.
Aug 17, 2022

Sapphire

Having the color of a blue sapphire.
Aug 17, 2022

Sapphire

Of or relating to a 65th anniversary.
Aug 17, 2022

Sapphire

(countable) A clear deep blue variety of corundum, valued as a precious stone.
Aug 17, 2022

Sapphire

A white, yellow, or purple variety of corundum, either clear or translucent.
Aug 17, 2022

Sapphire

A deep blue colour.
Aug 17, 2022

Sapphire

(countable) Any hummingbird in the genera Hylocharis and Chlorestes, as well as the rufous-throated sapphire, which is now in the genus Amazilia.
Aug 17, 2022

Sapphire

Any of the butterflies in the southern Asian lycaenid genus Heliophorus or the African lycaenid genus Iolaus.
Aug 17, 2022

Sapphire

Of a deep blue colour.
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Sapphire

Pertaining to a 45th year
Aug 17, 2022

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.
Aug 17, 2022

Sapphire

The color of the gem; bright blue.
Aug 17, 2022

Sapphire

Any humming bird of the genus Hylocharis, native of South America. The throat and breast are usually bright blue.
Aug 17, 2022

Sapphire

Of or resembling sapphire; sapphirine; blue.
Aug 17, 2022

Sapphire

A precious transparent stone of rich blue corundum valued as a gemstone
Aug 17, 2022

Sapphire

A transparent piece of sapphire that has been cut and polished and is valued as a precious gem
Aug 17, 2022

Sapphire

A light shade of blue
Aug 17, 2022

Sapphire

Having the color of a blue sapphire;
Sapphire eyes
Aug 17, 2022

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