Telequartz

The Telequartz Group of Mining Companies, founded by João Cosac in 1926, is Brazil`s largest, longest-established and best-qualified miner, processor and exporter of rock crystals. Working also with other minerals, the group is the largest exporter of quartz in the world nowadays. Brazil is estimated to have 53 Mmt of reserves representing 95% o....
Found on http://en.wikipedia.org/wiki/Telequartz
No exact match found