Sapphire is a high-purity and high-density, single-crystalline form of aluminum oxide that may contain chromia, titania, yttria, or other dopants. Sapphire is usually transparent or translucent.

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Sodium aluminate forms through the chemical reaction of aluminum oxide with sodium hydroxide and water, as follows: The residues sink gradually to the bottom of the tank and are later removed. In the ...

It looks like a tube made of glass but it’s actually aluminum. Well, aluminum with an asterisk beside it — this is not elemental aluminum but rather a material made using it. We got onto the ...

It is manufactured in electric arc furnaces by a reduction fusion of superior-quality bauxites. Aluminum oxide abrasives have high hardness and toughness for industrial applications, such as cleaning ...

Rubies are formed of a mineral called corundum, comprised of aluminum oxide. The red color is caused ... by their physical properties, including hardness, luster, color, density, and magnetism.

What if the metal in question is aluminum? [George Graves] sends us a link to a forum discussion on the subject from a few years ago, and to a YouTube video which we’ve embedded below the break.

It's a seven on the Mohs hardness scale and was first discovered ... Sapphires, like rubies, are made from corundum, which is ...

It has a hardness rating of about 1,450, and it sports pale white to yellow shades with ... Like other hardwoods, you can extend the lifespan with proper maintenance and an aluminum oxide finish, ...

The search for aluminum-free deodorants is on the rise, especially as smart shoppers start to think twice about the ingredients in the products that they use everyday. In recent years, there’s ...