Turquoise: Natural, Stabilized, Reconstituted or Fake?
Turquoise is the stone people most often buy without knowing what they bought. Two bracelets can sit side by side in a window, the same blue and the same size, and one is mined stone worth several hundred dollars while the other is dyed white rock that never contained a speck of turquoise. December's birthstone has more treated and imitation material in circulation than almost anything else we handle. Here is how to tell the categories apart and how to care for the real thing. Everything starts with porosity Turquoise forms when copper-rich groundwater seeps down through rock and reacts...
