Still available in the tourmaline de-stash are a few of these strands of tourmaline rough beads. All different colours; some bi-, some parti-colours. Strands are 16 inches long and the beads are variable in size, but I would say on average in the 10mm range. They are on a fantastic 45% discount, from $35.50 to $20 per strand and you can find them here.

joopygems.com