
Photo courtesy of:
Pieter Stemvers, Leusden, Netherlands
email: stemvers@hetnet.nl











Photo courtesy of:
Tom Loomis


Crystals up to 1 cm on a matrix covered with muscovite. The orange-yellow fluorescence is so fierce that even the dark coloured muscovite shows up on the photo. It is uncertain which activator is responsible for this fluorescence: Mn 2+ plus a co-activator or Dysprosium 3+. Stereo photo under short wave UV.


Fluorapatite crystals up to a few millimetres on a dark matrix. This specimen shows a strong magenta-pink fluorescence. The activator is believed to be trivalent samarium. Stereo photo under short wave UV.
Photo courtesy of:


Photo courtesy of:
Dan Weinrich
Dealer in fine mineral specimens




Photo courtesy of:
John Veevaert, Trinity Mineral Co
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