Private company
Telequartz
Brazilian company, founded in 19261
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.2 Wikipedia text CC BY-SA 4.0
Last updated Oct 21, 2026.
Overview
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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.2
Timeline
- 1926Founded Founded1
Links
- WikipediaTelequartz
- WikidataQ7696776
Sources
The numbers on this page point here. Each one links to the record it came from.
- 1WikidataTelequartz on Wikidata
- 2WikipediaTelequartz on Wikipedia