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O caráter dicotômico da produção de ametista no Estado do Rio Grande do Sul
2018
Ciência e Natura
Preserved Fulltext
In this paper is presented a brief revision of some gems from Rio Grande do Sul state (Brazil) where the following general aspects are outstanding: geology, mineralogy and trade. Some points of view about security in the job, health, processing and industrialization, as well as organization of cooperatives are also presented.
doi:10.5902/2179460x27245
fatcat:gl6bmcgic5hfpas5qz3bn5b3ce