Turquoise Sleeping Beauty Mine Arizona. The handcut beads in the above eardrops are about the last reasonably matched two from a strand of such superb Turquoise, the strand sourced at Sapphex when they were operating in the City, and that goes back two decades.
The Sleeping Beauty Mine shut down three, four years ago, depleted. There are dealers in the South-West who saw the closure coming and bought up stock in the rough, thus it is still possible to source this now very rare Turquoise at at least two of the big annual fairs in the South-West.
It is increasingly costly. AGrade material from this Arizona mine is recognised as being among the very best Turquoise in the world, the equal to the very best from the ancient mines of Persia.

The above Turquoise Sleeping Beauty is true in its colour, undyed, untreated, natural, with a standard surface waxing. It should be noted that Turquoise is a rock, not crystalline, and to a degree porous. The practice of treating Turquoise, standard in the States since the mid 1900s, and earlier, came into play because too many customers were blotching the colours with the chemicals in everyday products like detergents, chlorine, perfumes, suntan lotions.
Advice is: keep away from chemical-suffused products and give the gemstones a swab with a damp cloth after wear. Even with the best of care Turquoise will in time gradually darken in colour with wear, but if treated well it will darken nicely.