Maggie Wilson Author

Historical Non-Fiction in Northern Ontario

Archive for May 27th, 2014

One Word Photo Challenge: Glow-in-the-Dark

These two photos are of the same¬†crystal of fluorite under different light sources. It was found at the Flamboro Quarry, near Dundas, Ontario It is ¬†no longer in our collection, but I believe it was about 4 cm on the longest dimension. Inclusions of hydrocarbon lend the golden brown colour to the daytime shot. They are also responsible for the glow-in-the dark effect under long wave ultra violet light. And […]

Continue Reading →