Fresnel Lens melting GRANITE 2300˚ Fahrenheit make Obsidian FRESNEL LENS

Using a jumbo Fresnel Lens, molten granite (obsidian) is formed in under 20 seconds.
http://greenpowerscience.com/BLOGGER111/FresnelLensGranite.html

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Видео Fresnel Lens melting GRANITE 2300˚ Fahrenheit make Obsidian FRESNEL LENS канала GREENPOWERSCIENCE