Description
Box containing two prism crystals one clear and one yellow, a circular disc, a card slide containing a biotite sample, thin sheets of calcite folded in paper, a copper alloy screw and a wedge-shaped slide with a screw handle.
Box containing two prism crystals one clear and one yellow, a circular disc, a card slide containing a biotite sample, thin sheets of calcite folded in paper, a copper alloy screw and a wedge-shaped slide with a screw handle.
