dense barium sulfate prized for blue blades and honey clusters; top localities include Elk Creek, Meikle, Spain, Morocco; quality factors and care.
Regional guide
Barite from Frizington Mine, Cumbria, England
Frizington Barite, Cumbria: pale blue to blue-green tabular crystals, often doubly terminated with hematite; prized for color, form, and historic locality.
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