Inside a shell I quietly grow, smooth and shiny, see me glow. I love the sea but shine on land too, who am I? A treasure for you!

You can write me, you can play me and if you’ve got no talent, you can at least hum along. Birds and whales use me to communicate across distance quite long. And if you’re in a mood, play one, you can’t go wrong.

All dressed up in uniform, In uniformity we stand: Black against the snow-white storm, Monarchs of this barren land

I wield eighteen daggers, yet they are sheathed in velvet. I have a sandpaper kiss, but a voice like a soothing hum. I am a liquid that does not flow, And though I walk with silence, I demand all attention. What am I?

I'm not saying that I don't talk, but I keep my mouth shut as much as I can. So much so that people use me as an example! I try to be calm, but alas, I'm an anagram.