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Collection Tier:
Tier 3

Rocks and Minerals ➔ Zincite and Franklinite with Calcite

Identifier:
2019.1.2037
Description:
Franklinite, the black mineral seen here, is a rare iron oxide often found with calcite, willemite, and zincite. This specimen was found with zincite, a rare red mineral, and calcite, a calcium carbonate mineral.  

Franklinite Formula: (Zn,Mn,Fe2+)(Fe3+, Mn3+)2O4
Zincite Formula: (Zn,Mn)O
Calcite Formula: CaCO3
Source:
Museum Collection
Related Object
Calcite