They can be used to make jewelry, to make your bath more pleasant or, apocryphally, to buy an island.

Today it was raining so I went out to catch some fog. Unfortunately I . . .

What do you get if you divide the circumference of a bowl of ice cream by its diameter?

My first is a color, or the absence of light. My last follows 'snail', as it moves slower than a modern track. Together, I use knowledge to extort you, to my delight.

I am a clock that hates the dark, dependent on the sunlight’s mark.