American Turquoise also varies substantially from the different locations it is found. Turquoise is formed by moisture leaching down into the ground through the mineral rich soil. The liquid flows through and into crevasses and voids below the surface of the earth. Turquoise Nuggets form in a void within clay and Vein Turquoise from in cracks and voids in hard rock.
It is also known for its spectacular matrix which comes from the host rock it was formed in. Turquoise can actually be identified from which Turquoise Mine it came from by the color and different elements of its matrix. Bisbee Turquoise is known for its beautiful chocolate brown to reddish brown matrix while Royston Turquoise is known for its golden colored matrix. Occasionally, a Spiderweb pattern matrix is found in Turquoise which is very desirable to collectors, Spiderweb Turquoise is rare and commands a substantially higher value when found.