http://en.wikipedia.org/wiki/Galena
http://en.wikipedia.org/wiki/Lead%28II%29_sulfide
PbS can be formed as nanocrystals.
:D
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http://en.wikipedia.org/wiki/Galena
http://en.wikipedia.org/wiki/Lead%28II%29_sulfide
PbS can be formed as nanocrystals.
:D
One of the earliest uses of galena was as kohl, which in Ancient Egypt, was applied around the eyes to reduce the glare of the desert sun and to repel flies, which were a potential source of disease.[1]
http://en.wikipedia.org/wiki/Kohl_%28cosmetics%29
Jack Sparrow, a character in Pirates of the Caribbean film trilogy, wears kohl around his eyes.
battery bias ? :p
http://www.youtube.com/watch?v=vcM9J...eature=related