The gemstone deposits of Brazil: occurrences, production and economic impact

PDF) Brazilian Colored Gemstones in Portuguese 18th–19th Century Jewelry (Proceedings of the IV International Gemological Symposium)

PDF) A Review of Gemstone Occurrences, Provenance, and Origins in Nigeria

Coloured Stone Mining and Trade in Brazil: A Brief History and Current Status. - Document - Gale Academic OneFile

Socio-environmental impacts of diamond mining areas in the Democratic Republic of Congo - ScienceDirect

PDF) A Review of Gemstone Occurrences, Provenance, and Origins in Nigeria

Minerals, Free Full-Text

Gemstones American Scientist

Brazilian Gemstones: Earth-Science Reviews, PDF, Gemstone

Anthropic Vulnerability of a Hydrothermal Mineral Deposit and Related Mining Heritage, a Case Study from a Medieval Gold-Silver Mining Area, Telkibánya, Hungary

PDF] The gemstone deposits of Brazil: occurrences, production and economic impact

Brazilian Gemstones: Earth-Science Reviews, PDF, Gemstone

IJERPH, Free Full-Text

7 Negative Environmental Impacts Of The Gem Mining Industry - BIRON® Gems

Anthropic Vulnerability of a Hydrothermal Mineral Deposit and Related Mining Heritage, a Case Study from a Medieval Gold-Silver Mining Area, Telkibánya, Hungary

Ethical Mining Practices: Where StoneBridge Stands Blogs — StoneBridge Imports – Stonebridge Imports