Paula Radke flat oval bead 30x20mm spiral wrapped in deep blue glass and dichroic strips that look green or golden depending on the way the light hitst them.
Paula was an early adopter and strong promoter of dichroic glass beads
Dichroic glass is made by layering multiple layers of thin metal oxides on glass. These layers cause some wavelengths of light to be reflected while others are transmitted resulting in the color changes we see.
It has a variety of decorative, architectural, and scientific uses including protecting spacecraft instruments.
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