Translucence

I see everything.

I see the brilliant white powdery snow outside melt into the grass as fine as silk, and I see the egg-yolk yellow sun envelop the sky while the leaves become crisp and beautiful colors fall.

I am always there.

When you are sad, happy, or angry, I will be there. I cannot comfort you, but I can be with you. I am everywhere in your house that can access the outside world, and there could be more than one of me.

I will protect you.

I will always protect you, and I can take bullets for you. I cannot hurt you unless you break me.

You can release me.

When I am released I feel the wind tickling my senses, and I feel as free as can be when I am swaying in the wind.

I am freeform.

I can be molded or colored in whatever way you like, but once I harden I am who I am.

I am born as sand.

The fine grains of quartz crystals that make me are as clear as sparkling deep blue water.

What am I?