Question

Products that contain the mineral of corundum

Answer 1

Corundum is a type of mineral from which we obtain rubies, sapphires, and abrasives

Explanation:

• Corundum is a crystalline form of  $Aluminum \ oxide$ ( $Al_{2}O_{3}$ ) with traces of iron, titanium, and chromium. It is a mineral that contributes to the formation of rocks.
• It is one of the naturally transparent materials, but when impurities are present, it can have a variety of hues. Transparent specimens are used as gems such as sapphires and rubies.
• The presence of chromium in the corundum gives rubies their red color. Sapphires are the other shades of translucent corundum. The presence of titanium and iron in deep blue sapphires provides them its hue.
• It is present in variable colors such as colorless, yellow, orange, red, blue, violet, golden-brown, gray, and green.
• Corundum is also used as an abrasive because it has a hardness of 9.0 and can scratch almost anything. It is used in sandpaper and in industrial abrasives.

Answer 2

Transparent specimens are used as gems such as sapphires and rubies. Rubies are red due to traces of chromium in the corundum. All other colors of transparent corundum are called sapphires. Deep blue sapphires are blue due to the presence of titanium and iron.