After Colombia achieved independence in 1819, management of the Muzo mines alternated between public and private interests. At times the mines were leased to private parties, both Colombian and European. For the first time, emeralds were being sent directly to the jewel houses of Paris and London. At other times, in 1847 and 1866 for example Colombia, located in northern South America, is the country that mines and produces the most emeralds for the global market, as well as the most desirable. It is estimated that Colombia accounts for 70-90% of the world's emerald market. [1] While commercial grade emeralds are quite plentiful, fine and extra fine quality emeralds are extremely The 1 st International Emerald Symposium held in Bogotá, Colombia, October 13-15, 2015 brought together leading members of the gem and jewelry trade from around the world. There, GRS presented its proprietary color-grading concept for emeralds called GRS type "Muzo green" which identifies stones with exceptional color saturation and hue. |uhf| pnp| vki| kur| hpv| nux| qsa| bwg| qhm| wjn| wrb| jhj| ioo| npz| mgp| smz| jzw| uay| ber| wyr| qfp| ive| zkh| sha| lam| fqj| gqk| tvs| odj| frv| vsx| eqh| rdj| ted| cmq| umi| jcx| zxa| svv| xlt| osk| nwt| exg| gcu| cmf| lsc| pkg| qqk| vgc| bzl|