I bought this turquoise cabachon from Andy Brown in Cerrillos, N.M. this past  June.  He mined it in local mountains and cut and polished it.  The ground in this part of New Mexico contains lots of copper and iron, which then dissolves in groundwater and stains the turquoise a wonderful pale blue and green.  The challenge for me is to design a piece of jewelry that will show off the natural beauty of the stone.