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turquoise is an opaque mineral that occurs in beautiful hues of blue, bluish green, green, and yellowish green. it has been treasured as a gemstone for thousands of years. isolated from one another, the ancient people of africa , asia , south america and north america independently made turquoise one
of their preferred materials for producing gemstones, inlay, and small sculptures. chemically, turquoise is a hydrous phosphate of copper and aluminum (cual (po ) (oh) · h ). its only important use is in the manufacture of jewelry and ornamental objects. however, in that use it is extremely popular...
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