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Corundum

usgb/kəˈrʌndəm/Volume
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Material Strength

Corundum is extremely hard, second only to diamonds, which suggests high durability in its context.

Illustration for Material Strength
Due to its hardness, corundum is used in watch faces.
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Gemstone Color

Corundum forms rubies or sapphires depending on trace elements, indicating its versatility in jewelry.

Illustration for Gemstone Color
While shopping for jewelry, I learned that both rubies and sapphires are actually colored corundum.
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Industrial Usage

Corundum's abrasive qualities mean it's often mentioned in mechanical or industrial contexts.

Illustration for Industrial Usage
They used a corundum-coated disk for cutting the steel.
Visual representation of the word "Corundum"

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