Gemstone district
Minas Gerais Tourmaline Districts
Brazilian pegmatite districts are important sources of Elbaite and many colored Tourmalines.
Evidence-backed overview
The place, clearly defined
Brazilian pegmatite districts are important sources of Elbaite and many colored Tourmalines.
Geological context
How the occurrence is understood
Brazilian pegmatite districts are important sources of Elbaite and many colored Tourmalines.
Bidirectional relationships
Documented gemstones
Occurrence and production are separate claims. A production label is date-bounded and does not guarantee quality, origin determination, or market value.
Tourmaline
Evidence identifies the location as commercially or historically important for this gem.
Occurrence is documented, but production status has not been assessed.
Evidence ledger
Sources & verification
Sources are deduplicated across the geographic record. Current-production claims receive explicit review dates; a map point never substitutes for geological or production evidence.
- [1]Tourmaline Description.
Gemological Institute of America
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