Some pieces of feldspar fluoresce in two different colors, nicely zoned. Have heard that the activator for the blue fluorescence is uranyl, unknown for the violet. This piece has a couple of small zircons.
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Some pieces of feldspar fluoresce in two different colors, nicely zoned. Have heard that the activator for the blue fluorescence is uranyl, unknown for the violet. This piece has a couple of small zircons.