What is this crystal (blue crystal in marble rock)?

Hi there!

Some background information:
I went on a field trip for my Geomorphology class to Cantley Quarry, Quebec. It's a neat place that has lots of glacial landforms, and basically is made of marble.

Anyway, being the rock nerd that I am, I took a few nice rocks from the area. One of the marble rocks, to my surprise, had this little blue crystal poking out of it. I couldn't find any others around with crystals like that.

Well, I think it's pretty cool, and I'm keen to identify. My limited geology knowledge has me thinking that it's a little aquamarine crystal, based on the colour. I have no idea if beryls can form in marble, though.
So, what do you guys think? Here are a few pictures:

http://i.imgur.com/GP0RKbT.jpg
http://i.imgur.com/SquXKpY.jpg
http://i.imgur.com/tB6MBKN.jpg
http://i.imgur.com/HV2AmbR.jpg

Thanks!

Michelle