Strontium minerals occur in several different veins in central Ontario; most commonly as gangue minerals but occasionally in sufficient quantity to have economic possibilities. At Galetta, west of the City of Ottawa, barytocelestite, 5BaSO4· SrSO4, is associated with calcite in a vein that is being worked for lead.1 Well formed crystals of celestite are found at the old Frontenac lead mine north of Kingston. Tabular crystals and fibrous aggregates up to several feet in diameter occur in veins associated with fluorspar in the Madoc district, north of Belleville. Two other localities for celestite are at Lyndhurst on the Brockville-West-port branch of the Canadian National Railway and in the neighborhood of Verona, north of Kingston.

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