I work with turquoise all the time and have cleaned it in several
different ways. My family used to use exclusively sudsy ammonia,
available at any grocery store, which is still a really good way to
clean turquoise to get tripoli and rouge off of it. I often use my
sonic cleaner which will make many cringe when they read that but
that’s what I do.
Turquoise is heat sensitive though and if it got hot enough it will
turn a sickly green and no amount of cleaning or polishing will