A small percentage of purple fluorite from the Ojuela Mine in Mapimi, Durango, Mexico, shows a beautiful, rich, red fluorescence under long wave UV. This is a very rare and unusual fluorescent response for fluorite, as blue, purple and white are the most common colors of fluorescence seen in this mineral. This is a fine example of red fluorescent fluorite from Mapimi, Mexico. Under visible light, this specimen is a transparent purple color, looking very similar to gem amethyst. Under long wave UV, however, the fluorite fluoresces a deep cherry red. The size of this piece is 53.5 x 44.2 x 33.0 mm, and it weighs 68 grams.
As shown in the photograph above, this Mapimi fluorite specimen shows a rich, cherry red fluorescent response under long wave UV (365 nm).
When shown under visible light (above), the fluorite has a beautiful, gemmy, amethyst purple color.