Random Riddle: The Shining

I with borrowed silver shine,
What you see is none of mine.
First I show you but a quarter,
like the bow that guards the Tartar;
Then the half, and then the whole,
ever dancing around the pole;
And true it is, I chiefly owe
my beauty to the shades below.

Who am I?

 

Random Riddle: The Shining