VESUVIANITE Ca10Mg2Al4(SiO4)5(Si2O7)2(OH)4 Tetragonal

Description: Vesuvianite most commonly forms in metamorphosed calc-silicate rocks.

OCONTO COUNTY: Vesuvianite reportedly occurs with garnet, scapolite, clinopyroxene, hornblende and plagioclase in the Waupee Formation in the Mountain area. Here it is found as a contact metamorphic mineral where the Waupee formation is adjacent to the Hagar granite (Lahr, 1972).

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