A mineral consisting of hydrated zinc silicate, typically occurring as flat white prisms.
- Pseudomorphs of sphalerite after galena, tetrahedrite, barite, and calcite have been found; hemimorphite and smithsonite pseudomorphs after sphalerite are reported.
- Local collectors had tentatively identified it as willemite or smithsonite, based perhaps on the occurrence of botryoidal blue hemimorphite at the same locality.
- Historically, smithsonite is referred to as calamine in some descriptive literature, particularly that related to Great Britain and Australia, leading to confusion with hemimorphite if specific compositional data are lacking.
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