This stone has turned out to be one of the most beautiful blues and..................one of the most rare. I picked up a few pieces of this stone at the gem and mineral show in Tucson and was told it was rare. I didn't pay much attention because they always claim that, but in this case it really was. I have been selling this stone for a very reasonable price, but when I went to get more info for this blog.................... it is really rare. I have been selling it for far less than I should. In fact, this stone is normally only found in museums according to google. It is very rare and very expensive!!! It is similar to turquoise, but is not a copper mineral. It has about the same hardness with a color you never find in real turquoise.