Hackmanite
Davis Quarry, Dungannon Township, Town of Bancroft, Hastings County, Ontario, Canada
Composite image showing the effects and aftereffects of exposing sodalite, variety hackmanite. to ultraviolet light. As received with visible light, upper left, under UV short wave illumination, upper right, under UV long wave, lower right, and finally in visible light, with a hint of purple color shift due to exposure to the UV light - this ...
© 2010, JGW