Hi there. I am selling this very unusual and amazing azurite sun crystal cluster mineral specimen. There is a debate about the true nature of these specimens. Some geologists believe they are concretions while some experts believe them to be fossils of some form of marine algae! It is from Malbunka Mine in the Gardiner Range, Northern Territory, Australia. This type and formation of azurite is super super rare and really really amazing. If you have any questions, do not hesitate to ask me. Have fun bidding, thanks so much for visiting my store and have a great day:>).