Minerals with Unusual Properties presented by Dr. Arthur J. Friedman
This speaker series is presented by the Alfie Norville Gem and Mineral Museum Docent team. This seminar is free and open to the public!
This talk discusses and illustrates with live demonstrations a number of unusual optical effects when certain minerals are exposed to laser, polarized and ultraviolet light, as well as heat, extreme cold and mechanical stress. The nature of electromagnetic radiation is explained and possible reasons for the unusual properties of minerals that are non-fluorescent at room temperature, but fluoresce brilliantly when cooled to -196 degrees Celsius will be given. A strange mineral that phosphoresces strongly when exposed to visible (violet) light will also be shown.
The audience will learn what causes a mineral's color, why some minerals change color when viewed with different kinds of light, why images are doubled when viewed through a particular kind of mineral and why some specimens glow brightly when exposed to ultraviolet light, while others continue to glow in different colors when the light is turned off. These and a number of other surprises await the viewer of this presentation.
A bit about the presenter:
Dr. Art Friedman was an accomplished and internationally recognized synthetic organic chemist for 40 years and has numerous publications and patents to his credit. Although his career has been primarily devoted to R&D activities in the fields of pharmaceutical, agricultural and environmental chemistry, Art has been involved in bringing the joy of science to the masses for over 25 years. He created a program, “The Magic of Chemistry”, which was seen by over 50,000 students in five states.