In its most iconic form, turquoise looks like a clear blue sky. Beneath that tranquil surface, however, there is a complicated stone. ‘‘It is not about color,’’ said Joe Dan Lowry, co ...

Normally when we hit a good gem vein, you hear a click on your pick and you know that you're on turquoise. So I'll get down to that area, clean it all off, and then I'll mine underneath the bottom ...