This is a handmade pendant made from a small glass bottle filled with pieces of semi precious stones.
 
Fluorite is said to improve concentration and decision making.
Which is cool.  Oh look a squirrel!  Let's pet it!
;)
Don't make bad decisions guys, don't pet squirrels.  Buy the necklace.
 
We also have Chrysoprase  and Pixie Dust (Pyrite).