https://fortress.wa.gov/ecy/publications/publications/90e35.pdf
possibly naturally occurring elevation of chromium.  (page 14)
thaumasite
teal green
lake sutherland
lake Crescent

"I’ve mentioned before in another of my blogs that the water color of Lake Crescent is a clear, teal blue color mixed with shades of turquoise, depending on the water’s depth and sunlight reflecting off its surface. It’s unlike any other lake I’ve come across. "
Cobalt Blue
Teal green
Thaumasite