When discovered near Battle Mountain, Nevada, they were not sure what it was. Because of the hardness of the stone, and the colors of the vein, a decision was made to have it assayed and their suspicions proved correct, it was in fact turquoise. Dry Creek Turquoise is a natural stone and has not been treated with any process to change the color and/or the hardness of the natural materials of the stone.
Turquoise gets its color from the heavy metals in the ground where it forms. It is hydrous phosphate of aluminum, containing copper and iron and so it is somewhat porous. Blue turquoise forms when there is copper present, which is the case with most Arizona turquoise. Green turquoise forms when iron is present, the case with some Nevada turquoises. Dry Creek Turquoise forms when there are no heavy metals present. The lack of any specific color consistency and exotic matrixed varieties makes this stone distinctive and unique from other turquoises. To date, no other vein of this turquoise has been discovered any where else other than at the Dry Creek Mine and when this vein runs out, that will be the last of it. Because this turquoise is as rare as the sacred buffalo, the Indians call it "Sacred Buffalo Turquoise".
So many geological chains of events must synchronize to create just one thin vein of turquoise that the mineral can rightly be envisioned as a fluke of nature. Turquoise is the rare and improbable product of an incalculable number of chemical and physical processes that must take place in the right combination and proper environment over a time span of hundreds of thousands - if not millions - of years.