It's the ice, the same happens in Lake Baikal that has one of the most amazing turquoise shades in the world, because the water there is very clean (https://steemit.com/steemiteducation/@ruth-girl/bizarre-natural-phenomena-vol-18-shards-of-turquoise-glass-beautiful-lake-baikal)
Why would Trumpman get the whole steem?
I think that was meant to scare me and not get into the cave :P
Thanks for reading Sammy!
Just went through the link. Lake Baikal is just awesome. The icy blue sculptures are just dope. Maybe nature is an artist; who knows?
Nothing scares you Ruthie :D