Oco (Ocho) geode deposits, Três Pinheiros, Fountoura Xavier, Rio Grande do Sul, South Region, Brazil

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Deposits of Dark reddish brown soils in the Tres Pinheiros Region, which produce the Oco or Ocho geodes.

References
-Cross, Brad l., & Culp Zeitner, June; 2006 "Geodes, Natures Treasures"

Mineral List:

'Chalcedony'
Goethite ?

Quartz
Siderite ?

4 entries listed. 3 valid minerals.

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