It looks a bit small to work as a pendant, and tourmaline is not hard enough to be an everyday ring stone. If you want to 1) see the color and 2) wear the stone on a frequent basis, I would recommend a bracelet or bangle - maybe something like in the avatar of the poster above me.
Do you know what? It may be a bit tiny. I just got lost in the colour ha ha. Open for ideas and I love the pics above @elle_71125 - thanks for posting. I am thinking yellow gold.
I don't really mind if it is a smaller ring, I won't get to wear it day to day (doctor).