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Collection Tier:
Tier 3

Rocks and Minerals ➔ Pyrite, Calcite, and Chalcocite

Identifier:
2019.1.1566
Description:
Pyrite, commonly known as fool's gold, is a sulfide mineral containing iron. When exposed to oxygen, the color darkens, turning from a brass-yellow to shades of brown. This specimen is also with calcite and chalcocite and was found in Cumberland, England. 

Pyrite Formula: FeS2
Calcite Formula: CaCO3
Chalcocite Formula: Cu2S
Date:
1886 – 1905
Source:
Museum Collection
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