Under long- and short-wave UV light, a white to light yellowish glow was visible only ... spectroscopic techniques identified this as a composite of natural rock crystal and turquoise, the reason for ...
Microscopic observations revealed the typical visual characteristics of turquoise: blue and white mottling, a granular texture ... cavities of the turquoise with a mixture of crushed pyrite crystals ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback