Germanium under infrared light.
<video controls autoplay loop> <source src="https://diqn32j8nouaz.cloudfront.net/germanium_infrared.mp4" type="video/mp4"> Your browser does not support the video tag. </video>
Previously:
https://www.homemadetools.net/forum/...151#post195588
https://www.homemadetools.net/forum/...965#post179665
https://www.homemadetools.net/forum/...149#post191687
https://www.homemadetools.net/forum/...702#post151948
https://www.homemadetools.net/forum/...242#post184827
