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VIRTUAL FIELD TRIP TO THE KEWEENAW PENINSULA, MICHIGAN - MINERALOGY (LAPIDARY MATERIALS)   

     

Datolite, Centennial mine, 10cm across Datolite with green secondary copper mineral inclusions. Centennial mine 3 cm. across.

Datolite with cut faces (end specimens) and natural exteriors. Larges nodule is 5 cm.

 

Datolite, Caledonia mine Seaman Museum specimen. Specimen is 10 cm. across Yellow datolite with minor copper and adularia (both red). Specimen is 2 cm. across and is from the Quincy mine.

 

Isle Royale Mine, Houghton Co. 5cm across. Michigan Mine, 4cm. across. Ojibway Mine, unaltered copper and tenorite on edge, secondary copper minerals in center. 2cm across.

 

Massive prehnite in basalt 3cm across

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