Aragonite parade in Wien

Dear Friends
of the different mineralogical collections of the Natur Historisches Museum in Wien http://www.nhm-wien.ac.at/en one of the best is definitely the Aragonite parade : https://en.wikipedia.org/wiki/Aragonite showing the different coloured metamorfic shapes that this common carbonate mineral gladly assumes. Fibrous, columnar and globular specimen proudly show themselves for the delight of the visitor.
Salutations
Giancarlo