The blue in Turquoise is enhanced with copper is present. If the area where turquoise is formed contains more aluminum, the turquoise will shade to green. When zinc is present, the deposits are a yellow green color, that so far is very rare and have only been found in a few areas.
The Matrix in Turquoise is the dark markings, the rock the turquoise formed in. When stones are cut, some of the matrix remains bound to the turquoise. Matrix colors vary because turquoise can form in different rocks.
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February 23rd, 2010 at 5:05 pm
Interesting! I also have learned that
turquoise from Iran is considered some of the most desirable since it does not have much veining and has that sky-blue color.