Table of Contents From the Editor—A Study in Pink by Howie Green 1–3 Leucophanite from the Langesundsfjord District, Norway by Howie Green and Martijn Hendrikx 4–13 Meliphanite by Howie Green 14–20 Leucophanite from Mont Saint-Hilaire, Quebec, Canada by Howie Green...
What is Tenebrescence?
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...
How does light, heat, and time affect tenebrescence?
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...
Greenland Hackmanite: Quick Change Artist, Tenebrescent Champion
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...
UV Waves Vol. 55 Num. 5&6
Table of Contents Long Lake Zinc Mine, Parham, Frontenac County, Ontario, Canada by Jon Amsterdam 1–5 LLZM Photo Gallery by — 4–5 Silver Crater Mine, Faraday Township, Ontario, Canada: A Historic Uranium Prospect and Source of Exquisite Betafite Crystals by Sean...