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VIRTUAL FIELD TRIP TO THE KEWEENAW PENINSULA, MICHIGAN - MINERALOGY (LAPIDARY MATERIALS)
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| Datolite, Centennial mine, 10cm across | Datolite with green secondary copper mineral inclusions. Centennial mine 3 cm. across. |
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| Datolite with cut faces (end specimens) and natural exteriors. Larges nodule is 5 cm. |
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| 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. |
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| 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. |
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| Massive prehnite in basalt 3cm across |