In Search of that Elusive Red Response in Fluorite to Upper Band Long Wave UV

Don Newsome, an avid collector of fluorescent minerals and president of UV Systems, a manufacturer of high quality UV lamps and accessories, pauses to examine a specimen of Spanish Fluorite. “Very rarely, perhaps with just five specimens out of hundreds I have examined, will one see red response to the upper band long wave . . . This [very rare] response seems insensitive to the color of the crystals” The specimen in question did not have that trait, and Don moved on—the search continuing. Robert Meyer photograph, taken at the 2009 Seattle Mineral Market.

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Photo added: 4th Jun 2009