In the early 1800's geologists noted that some specimens of sodalite from Greenland exhibited a bright pink color on freshly broken surfaces. This color rapidly faded ("bleached") upon exposure to bright light, reverting back to its original (natural?) color. Exposure...
The following article is the summary of multiple conversations from the Fluorescent Minerals Facebook group, where people experimented with tenebrescent minerals and reported their observations. Tenebrescence is a reversible photochromic phenomenon in which a mineral...
This article was originally published on Nature’s Rainbow. Tenebrescence of Greenland sodalite is amazing. This is a piece of a deeply tenebrescent sodalite. Note how when the SW light is first turned on the sodalite fluoresces a bright orange but almost immediately...
Table of Contents Long Lake Zinc Mine, Parham, Frontenac County, Ontario, Canada by Jon Amsterdam 1–5 Silver Crater Mine, Faraday Township, Ontario, Canada: A Historic Uranium Prospect and Source of Exquisite Betafite Crystals by Sean Stimac 6–8 Editor’s Note—The...
Table of Contents From the Editor — “Ohwa Tagu Siam” by Howie Green 1 Deep-Red Fluorescent Fluorite from Mapimi, Mexico (and Elsewhere): A Case of an “Electronic Defect” as an Activator by Glenn Waychunas 2–7 FMS Membership Responds: Red Fluorescent Fluorite by — 8–16...
Table of Contents Sis for Sørensenite by Simone Conti 1–10 It Takes a Village to Raise a Fluoresophile by Howie Green 11–19 The 60th Annual Gem and Mineral Show of the Austin, TX Gem and Mineral Society, 2022 by Alan J. Cherepon and Paul K. Bordovsky Jr. 20–22 FMS...
Table of Contents From the Editor - 'To a Mouse': Greenlandic Aphorisms by Howie Green 1–5 Radiation Alteration of Sodalite from Sar-e-Sang, Badakhshan, Afghanistan by Michael Crawford 5–12 Solarization and Cost Analysis of the Hoya Optics UL254L SW Filters...