Corundum: meaning, definitions and examples

Used in scientific or industrial contexts to refer to a hard, crystalline form of aluminum oxide, which can be used in various applications including abrasives and refractory materials.

• Corundum is second only to diamond in terms of hardness.
• Industries often use corundum for cutting, grinding, and polishing.

Refers specifically to the red variety of corundum, commonly used in jewelry and valued for its rich color.

• She received a beautiful ruby ring for her birthday.
• Rubies are often associated with love and passion.

Used to describe the blue variety of corundum, though sapphires can come in various colors. Often used in high-end jewelry.

• Her engagement ring had a stunning blue sapphire in the center.
• Sapphires are considered one of the four precious gemstones.

A general term used in jewelry or when discussing precious or semi-precious stones that are used for adornment.

• Diamonds, emeralds, and amethysts are all types of gemstones.
• She wore a necklace adorned with colorful gemstones.

Use in scientific or industrial contexts, particularly when referring to the mineral's hardness or its use in abrasives and gemstones.

• Corundum is second only to diamond in hardness.
• Synthetic corundum is often used in industrial applications.

Commonly used in contexts involving polishing or sanding materials, especially in manufacturing or DIY projects.

• Emery boards are great for shaping and smoothing nails.
• Emery cloth is used to prepare metal surfaces before painting.

Often used in everyday language to refer to granular material with abrasive properties, as well as in a metaphorical sense to describe determination.

• The sandpaper's grit is important for the finish on the wood.
• It takes a lot of grit to run a marathon.

Typically used in contexts involving personal care or cleaning to describe the lightweight, porous volcanic rock used for exfoliating or polishing surfaces.

• Pumice stones are great for removing calluses from your feet.
• Pumice can be used to clean stubborn stains from toilets.