Turquoise Cabs

I am a Canadian living in Malaysia and I have been buying
turquoise cabs at a local market for use in my sterling silver
work. I have been paying about $2 - $3 per cab (about 8mm x 15
mm) I am heading back to Canada soon and was wondering if I
should stock up here. Can anyone tell me what a typical
turquoise cab costs in North America. Also the same question for
Tiger’s Eye. I have been paying about the same price for 8 mm x
8mm.

MILT