The lack of a grading system for the popular stone has prompted a father-son team to spend the last five years working on one. Turquoise stones from the blue and green master sets at the Turquoise ...
ALBUQUERQUE, N.M. (KRQE) — It’s a “hydrated phosphate of copper,” but you may just know it as turquoise. The blue-green mineral widely regarded as a gemstone has significant deposits across the world, ...
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