Unfortunately turquoise is really expensive.
Talk about expensive.......try purchasing Dilithium Crystals....$$$$$$$ Star Ship grade....Maybe when comparing it to plain rocks...otherwise, turquoise is actually pretty inexpensive.
True "gem quality" Sleeping Beauty turquoise is getting rather spendy since they shut down the mine a few years ago...and supply of the most sought-after turquoise is running out, but otherwise...not very expensive at all.