Famous for producing some of the hardest Turquoise ever found, the Blue Diamond mine is located outside of Austin, Nevada, and was first mined in the 1930s. The mine is considered a “hat mine”. A hat mine is a small deposit of turquoise that “you can cover with your hat”. This very, very rare Turquoise is exceptional and this particular piece is spectacular, with its internal ‘caves’. This stone is a WHOPPING 112.6 CARATS! It is a trophy gem by anyone's standards, and the largest and most interesting Blue Diamond gem I have had the pleasure to cut! If you’d like, by private arrangement, I will design and manufacture a setting for it in silver or gold. I am an award-winning jeweler and gemologist with over 50 years of experience!