Optical Materials

verb to perceive or understand the true nature of something, especially when it is hidden or deceptive

• The glass windows are see through, allowing natural light to illuminate the room.
• I can see through your excuses, just tell me the truth.
• She's so fake, you can see right through her.
• His lies were so transparent, anyone could see through them.

noun a transparent substance or object

adjective allowing light to pass through so that objects behind can be distinctly seen

• The company prides itself on being transparent in all of its business dealings.
• I appreciate when people are transparent with me about their intentions.
• I can't stand it when people aren't transparent and try to hide things.
• The clear blue sky was so transparent, it felt like you could reach out and touch it.

noun a mineral composed of calcium fluoride, used as a flux in iron smelting and as a source of fluorine for the chemical industry

• Fluorspar, also known as fluorite, is a mineral composed of calcium fluoride.
• I heard they found a new deposit of fluorspar up in the mountains.
• Some people believe that fluorspar has healing properties.
• Her words were as sharp and cutting as a piece of fluorspar.