Blue Bloods
When you swallow silver, it corrodes in your stomach acid and turns into silver salt, which can travel through your bloodstream and end up in your skin. When exposed to sunlight, the silver salt turns back to silver and colors your skin blue. The rich dined using real silver their whole lives. Over time it got into the blood stream. The poor used lesser metals (flatware) or wooden utensils.
The Comstock Load
With the "blue stuff" found in this trench, silver mining in America was born. In the rocker, along with the gold, was a large quantity of heavy blue-black material almost like putty that clogged the rocker and interfered with the washing out of the fine gold. When assayed on June 27, it was determined to be a rich sulfide of silver; in fact, the ore was three fourths silver to one fourth gold.
Argyria
The biggest risk associated with chronic exposure to colloidal silver is argyria.
Argyria is a condition that turns the skin a blue-gray color due to a buildup of silver metal particles in the body and skin. Silver deposits can also occur in the intestines, liver, kidneys and other organs
There is an American politician that turned has skin blue in the last 10 years or so.
