Flowers, rivers, and rock share this word.

Between wheel and hub, I reach across the distance. That's what I uttered.

I hang from a roof and look like a sharp spike, I’m made of water, not a pike also I melt when it’s sunny and freeze when it’s cold.

Rainbow be my nature though I favor gray and green Precious be my value though I'm far from most obscene Silica hydrated will diffract and sparkle light Truly rather useless 'cept adornment's lovely sight

Add a little pepper, a pinch of salt, and you’re doing this to your dish. Another form of me has four in a calendar year.