well... its common so it isn't worth much... and you'll need it when you want to make deldrimore steel ingots later in the game so you might want to hold onto it and just store it in your vault.
I'm going to take a wild shot in the dark and guess that you're still in the pre-searing area. After you move to post-searing talk to the Xunlai agents. For 50G they'll give you a vault that you can access from any town/outpost in that game and is shared for all of your characters.
It really doesnt matter. You can sell it but it won't really help you with cash. And before a ranger will need pink dust, it will begin dropping in bulk amounts in Kryta. ~10+ piles of dust and ~10+ bones drop several times on that mission.
After you move to post-searing talk to the Xunlai agents. For 50G they'll give you a vault that you can access from any town/outpost in that game and is shared for all of your characters.