Tag: Chalcedony
Are you aware the mineralogy of Chalcedony?
Of all of the minerals used as gems, non compares with quartz in its variety of incidence and in abundance of types. It's present...
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The countdown for the 2014 challenge has started
The Swiss watchmaker will partner with the legendary Swiss alpine team competition Patrouille des Glaciers (PDG) in Spring 2014. The PDG is the worldwide...
