Looks like that stuff in the photo has already been "stabilized" and definitely looks tumbled. Good quality turquoise never needs to be stabilized which is just soaking it in epoxy basically. The whole stabilizing thing only came about when the popularity of "native" turquoise jewelry exploded in the 1970s and the availability of good turquoise couldn't keep up with the demand for jewelry. Most of what comes out of American turquoise mines is way too soft for jewelry so the "stabilizing" came about. As a lapidary and jeweler I don't use treated stones and stay away from most turquoise since over 90% of what is on the American market today has suffered from color "enhancing" and/or stabilization. I prefer to give my customers real stones not globs of epoxy treated "stones". Sleeping beauty turquoise is fantastic, and the best American turquoise available, hard and great color but the price has more than quadrupled in the last five years.