I've had fun the past few days making several stretchy bracelets using odds and ends of turquoise beads in my stash. I mixed in some charms, some Chinese crystals, a large fluorite bead, a quartz bead, and other bits.
I started with these two together.
A third bracelet with some soft aqua stone beads mixed with a bit of turquoise.
I especially love this one with the large fluorite stone bead - you can see a bit of purple mixed in the stone.
Sometimes the knots come loose when you use the stretchy plastic cord. I always do a tight triple knot and then add a dot of super or Gorilla Glue on the knot. I've had pretty good luck using this trick to keep the bracelets from falling apart.